tools/slub/slabinfo.c

   1 /*
   2  * Slabinfo: Tool to get reports about slabs
   3  *
   4  * (C) 2007 sgi, Christoph Lameter
   5  * (C) 2011 Linux Foundation, Christoph Lameter
   6  *
   7  * Compile with:
   8  *
   9  * gcc -o slabinfo slabinfo.c
  10  */
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13 #include <sys/types.h>
  14 #include <dirent.h>
  15 #include <strings.h>
  16 #include <string.h>
  17 #include <unistd.h>
  18 #include <stdarg.h>
  19 #include <getopt.h>
  20 #include <regex.h>
  21 #include <errno.h>
  22
  23 #define MAX_SLABS 500
  24 #define MAX_ALIASES 500
  25 #define MAX_NODES 1024
  26
  27 struct slabinfo {
  28         char *name;
  29         int alias;
  30         int refs;
  31         int aliases, align, cache_dma, cpu_slabs, destroy_by_rcu;
  32         int hwcache_align, object_size, objs_per_slab;
  33         int sanity_checks, slab_size, store_user, trace;
  34         int order, poison, reclaim_account, red_zone;
  35         unsigned long partial, objects, slabs, objects_partial, objects_total;
  36         unsigned long alloc_fastpath, alloc_slowpath;
  37         unsigned long free_fastpath, free_slowpath;
  38         unsigned long free_frozen, free_add_partial, free_remove_partial;
  39         unsigned long alloc_from_partial, alloc_slab, free_slab, alloc_refill;
  40         unsigned long cpuslab_flush, deactivate_full, deactivate_empty;
  41         unsigned long deactivate_to_head, deactivate_to_tail;
  42         unsigned long deactivate_remote_frees, order_fallback;
  43         unsigned long cmpxchg_double_cpu_fail, cmpxchg_double_fail;
  44         unsigned long alloc_node_mismatch, deactivate_bypass;
  45         unsigned long cpu_partial_alloc, cpu_partial_free;
  46         int numa[MAX_NODES];
  47         int numa_partial[MAX_NODES];
  48 } slabinfo[MAX_SLABS];
  49
  50 struct aliasinfo {
  51         char *name;
  52         char *ref;
  53         struct slabinfo *slab;
  54 } aliasinfo[MAX_ALIASES];
  55
  56 int slabs = 0;
  57 int actual_slabs = 0;
  58 int aliases = 0;
  59 int alias_targets = 0;
  60 int highest_node = 0;
  61
  62 char buffer[4096];
  63
  64 int show_empty = 0;
  65 int show_report = 0;
  66 int show_alias = 0;
  67 int show_slab = 0;
  68 int skip_zero = 1;
  69 int show_numa = 0;
  70 int show_track = 0;
  71 int show_first_alias = 0;
  72 int validate = 0;
  73 int shrink = 0;
  74 int show_inverted = 0;
  75 int show_single_ref = 0;
  76 int show_totals = 0;
  77 int sort_size = 0;
  78 int sort_active = 0;
  79 int set_debug = 0;
  80 int show_ops = 0;
  81 int show_activity = 0;
  82
  83 /* Debug options */
  84 int sanity = 0;
  85 int redzone = 0;
  86 int poison = 0;
  87 int tracking = 0;
  88 int tracing = 0;
  89
  90 int page_size;
  91
  92 regex_t pattern;
  93
  94 static void fatal(const char *x, ...)
  95 {
  96         va_list ap;
  97
  98         va_start(ap, x);
  99         vfprintf(stderr, x, ap);
 100         va_end(ap);
 101         exit(EXIT_FAILURE);
 102 }
 103
 104 static void usage(void)
 105 {
 106         printf("slabinfo 4/15/2011. (c) 2007 sgi/(c) 2011 Linux Foundation.\n\n"
 107                 "slabinfo [-ahnpvtsz] [-d debugopts] [slab-regexp]\n"
 108                 "-a|--aliases           Show aliases\n"
 109                 "-A|--activity          Most active slabs first\n"
 110                 "-d<options>|--debug=<options> Set/Clear Debug options\n"
 111                 "-D|--display-active    Switch line format to activity\n"
 112                 "-e|--empty             Show empty slabs\n"
 113                 "-f|--first-alias       Show first alias\n"
 114                 "-h|--help              Show usage information\n"
 115                 "-i|--inverted          Inverted list\n"
 116                 "-l|--slabs             Show slabs\n"
 117                 "-n|--numa              Show NUMA information\n"
 118                 "-o|--ops               Show kmem_cache_ops\n"
 119                 "-s|--shrink            Shrink slabs\n"
 120                 "-r|--report            Detailed report on single slabs\n"
 121                 "-S|--Size              Sort by size\n"
 122                 "-t|--tracking          Show alloc/free information\n"
 123                 "-T|--Totals            Show summary information\n"
 124                 "-v|--validate          Validate slabs\n"
 125                 "-z|--zero              Include empty slabs\n"
 126                 "-1|--1ref              Single reference\n"
 127                 "\nValid debug options (FZPUT may be combined)\n"
 128                 "a / A          Switch on all debug options (=FZUP)\n"
 129                 "-              Switch off all debug options\n"
 130                 "f / F          Sanity Checks (SLAB_DEBUG_FREE)\n"
 131                 "z / Z          Redzoning\n"
 132                 "p / P          Poisoning\n"
 133                 "u / U          Tracking\n"
 134                 "t / T          Tracing\n"
 135         );
 136 }
 137
 138 static unsigned long read_obj(const char *name)
 139 {
 140         FILE *f = fopen(name, "r");
 141
 142         if (!f)
 143                 buffer[0] = 0;
 144         else {
 145                 if (!fgets(buffer, sizeof(buffer), f))
 146                         buffer[0] = 0;
 147                 fclose(f);
 148                 if (buffer[strlen(buffer)] == '\n')
 149                         buffer[strlen(buffer)] = 0;
 150         }
 151         return strlen(buffer);
 152 }
 153
 154
 155 /*
 156  * Get the contents of an attribute
 157  */
 158 static unsigned long get_obj(const char *name)
 159 {
 160         if (!read_obj(name))
 161                 return 0;
 162
 163         return atol(buffer);
 164 }
 165
 166 static unsigned long get_obj_and_str(const char *name, char **x)
 167 {
 168         unsigned long result = 0;
 169         char *p;
 170
 171         *x = NULL;
 172
 173         if (!read_obj(name)) {
 174                 x = NULL;
 175                 return 0;
 176         }
 177         result = strtoul(buffer, &p, 10);
 178         while (*p == ' ')
 179                 p++;
 180         if (*p)
 181                 *x = strdup(p);
 182         return result;
 183 }
 184
 185 static void set_obj(struct slabinfo *s, const char *name, int n)
 186 {
 187         char x[100];
 188         FILE *f;
 189
 190         snprintf(x, 100, "%s/%s", s->name, name);
 191         f = fopen(x, "w");
 192         if (!f)
 193                 fatal("Cannot write to %s\n", x);
 194
 195         fprintf(f, "%d\n", n);
 196         fclose(f);
 197 }
 198
 199 static unsigned long read_slab_obj(struct slabinfo *s, const char *name)
 200 {
 201         char x[100];
 202         FILE *f;
 203         size_t l;
 204
 205         snprintf(x, 100, "%s/%s", s->name, name);
 206         f = fopen(x, "r");
 207         if (!f) {
 208                 buffer[0] = 0;
 209                 l = 0;
 210         } else {
 211                 l = fread(buffer, 1, sizeof(buffer), f);
 212                 buffer[l] = 0;
 213                 fclose(f);
 214         }
 215         return l;
 216 }
 217
 218
 219 /*
 220  * Put a size string together
 221  */
 222 static int store_size(char *buffer, unsigned long value)
 223 {
 224         unsigned long divisor = 1;
 225         char trailer = 0;
 226         int n;
 227
 228         if (value > 1000000000UL) {
 229                 divisor = 100000000UL;
 230                 trailer = 'G';
 231         } else if (value > 1000000UL) {
 232                 divisor = 100000UL;
 233                 trailer = 'M';
 234         } else if (value > 1000UL) {
 235                 divisor = 100;
 236                 trailer = 'K';
 237         }
 238
 239         value /= divisor;
 240         n = sprintf(buffer, "%ld",value);
 241         if (trailer) {
 242                 buffer[n] = trailer;
 243                 n++;
 244                 buffer[n] = 0;
 245         }
 246         if (divisor != 1) {
 247                 memmove(buffer + n - 2, buffer + n - 3, 4);
 248                 buffer[n-2] = '.';
 249                 n++;
 250         }
 251         return n;
 252 }
 253
 254 static void decode_numa_list(int *numa, char *t)
 255 {
 256         int node;
 257         int nr;
 258
 259         memset(numa, 0, MAX_NODES * sizeof(int));
 260
 261         if (!t)
 262                 return;
 263
 264         while (*t == 'N') {
 265                 t++;
 266                 node = strtoul(t, &t, 10);
 267                 if (*t == '=') {
 268                         t++;
 269                         nr = strtoul(t, &t, 10);
 270                         numa[node] = nr;
 271                         if (node > highest_node)
 272                                 highest_node = node;
 273                 }
 274                 while (*t == ' ')
 275                         t++;
 276         }
 277 }
 278
 279 static void slab_validate(struct slabinfo *s)
 280 {
 281         if (strcmp(s->name, "*") == 0)
 282                 return;
 283
 284         set_obj(s, "validate", 1);
 285 }
 286
 287 static void slab_shrink(struct slabinfo *s)
 288 {
 289         if (strcmp(s->name, "*") == 0)
 290                 return;
 291
 292         set_obj(s, "shrink", 1);
 293 }
 294
 295 int line = 0;
 296
 297 static void first_line(void)
 298 {
 299         if (show_activity)
 300                 printf("Name                   Objects      Alloc       Free   %%Fast Fallb O CmpX   UL\n");
 301         else
 302                 printf("Name                   Objects Objsize    Space "
 303                         "Slabs/Part/Cpu  O/S O %%Fr %%Ef Flg\n");
 304 }
 305
 306 /*
 307  * Find the shortest alias of a slab
 308  */
 309 static struct aliasinfo *find_one_alias(struct slabinfo *find)
 310 {
 311         struct aliasinfo *a;
 312         struct aliasinfo *best = NULL;
 313
 314         for(a = aliasinfo;a < aliasinfo + aliases; a++) {
 315                 if (a->slab == find &&
 316                         (!best || strlen(best->name) < strlen(a->name))) {
 317                                 best = a;
 318                                 if (strncmp(a->name,"kmall", 5) == 0)
 319                                         return best;
 320                         }
 321         }
 322         return best;
 323 }
 324
 325 static unsigned long slab_size(struct slabinfo *s)
 326 {
 327         return  s->slabs * (page_size << s->order);
 328 }
 329
 330 static unsigned long slab_activity(struct slabinfo *s)
 331 {
 332         return  s->alloc_fastpath + s->free_fastpath +
 333                 s->alloc_slowpath + s->free_slowpath;
 334 }
 335
 336 static void slab_numa(struct slabinfo *s, int mode)
 337 {
 338         int node;
 339
 340         if (strcmp(s->name, "*") == 0)
 341                 return;
 342
 343         if (!highest_node) {
 344                 printf("\n%s: No NUMA information available.\n", s->name);
 345                 return;
 346         }
 347
 348         if (skip_zero && !s->slabs)
 349                 return;
 350
 351         if (!line) {
 352                 printf("\n%-21s:", mode ? "NUMA nodes" : "Slab");
 353                 for(node = 0; node <= highest_node; node++)
 354                         printf(" %4d", node);
 355                 printf("\n----------------------");
 356                 for(node = 0; node <= highest_node; node++)
 357                         printf("-----");
 358                 printf("\n");
 359         }
 360         printf("%-21s ", mode ? "All slabs" : s->name);
 361         for(node = 0; node <= highest_node; node++) {
 362                 char b[20];
 363
 364                 store_size(b, s->numa[node]);
 365                 printf(" %4s", b);
 366         }
 367         printf("\n");
 368         if (mode) {
 369                 printf("%-21s ", "Partial slabs");
 370                 for(node = 0; node <= highest_node; node++) {
 371                         char b[20];
 372
 373                         store_size(b, s->numa_partial[node]);
 374                         printf(" %4s", b);
 375                 }
 376                 printf("\n");
 377         }
 378         line++;
 379 }
 380
 381 static void show_tracking(struct slabinfo *s)
 382 {
 383         printf("\n%s: Kernel object allocation\n", s->name);
 384         printf("-----------------------------------------------------------------------\n");
 385         if (read_slab_obj(s, "alloc_calls"))
 386                 printf("%s", buffer);
 387         else
 388                 printf("No Data\n");
 389
 390         printf("\n%s: Kernel object freeing\n", s->name);
 391         printf("------------------------------------------------------------------------\n");
 392         if (read_slab_obj(s, "free_calls"))
 393                 printf("%s", buffer);
 394         else
 395                 printf("No Data\n");
 396
 397 }
 398
 399 static void ops(struct slabinfo *s)
 400 {
 401         if (strcmp(s->name, "*") == 0)
 402                 return;
 403
 404         if (read_slab_obj(s, "ops")) {
 405                 printf("\n%s: kmem_cache operations\n", s->name);
 406                 printf("--------------------------------------------\n");
 407                 printf("%s", buffer);
 408         } else
 409                 printf("\n%s has no kmem_cache operations\n", s->name);
 410 }
 411
 412 static const char *onoff(int x)
 413 {
 414         if (x)
 415                 return "On ";
 416         return "Off";
 417 }
 418
 419 static void slab_stats(struct slabinfo *s)
 420 {
 421         unsigned long total_alloc;
 422         unsigned long total_free;
 423         unsigned long total;
 424
 425         if (!s->alloc_slab)
 426                 return;
 427
 428         total_alloc = s->alloc_fastpath + s->alloc_slowpath;
 429         total_free = s->free_fastpath + s->free_slowpath;
 430
 431         if (!total_alloc)
 432                 return;
 433
 434         printf("\n");
 435         printf("Slab Perf Counter       Alloc     Free %%Al %%Fr\n");
 436         printf("--------------------------------------------------\n");
 437         printf("Fastpath             %8lu %8lu %3lu %3lu\n",
 438                 s->alloc_fastpath, s->free_fastpath,
 439                 s->alloc_fastpath * 100 / total_alloc,
 440                 s->free_fastpath * 100 / total_free);
 441         printf("Slowpath             %8lu %8lu %3lu %3lu\n",
 442                 total_alloc - s->alloc_fastpath, s->free_slowpath,
 443                 (total_alloc - s->alloc_fastpath) * 100 / total_alloc,
 444                 s->free_slowpath * 100 / total_free);
 445         printf("Page Alloc           %8lu %8lu %3lu %3lu\n",
 446                 s->alloc_slab, s->free_slab,
 447                 s->alloc_slab * 100 / total_alloc,
 448                 s->free_slab * 100 / total_free);
 449         printf("Add partial          %8lu %8lu %3lu %3lu\n",
 450                 s->deactivate_to_head + s->deactivate_to_tail,
 451                 s->free_add_partial,
 452                 (s->deactivate_to_head + s->deactivate_to_tail) * 100 / total_alloc,
 453                 s->free_add_partial * 100 / total_free);
 454         printf("Remove partial       %8lu %8lu %3lu %3lu\n",
 455                 s->alloc_from_partial, s->free_remove_partial,
 456                 s->alloc_from_partial * 100 / total_alloc,
 457                 s->free_remove_partial * 100 / total_free);
 458
 459         printf("Cpu partial list     %8lu %8lu %3lu %3lu\n",
 460                 s->cpu_partial_alloc, s->cpu_partial_free,
 461                 s->cpu_partial_alloc * 100 / total_alloc,
 462                 s->cpu_partial_free * 100 / total_free);
 463
 464         printf("RemoteObj/SlabFrozen %8lu %8lu %3lu %3lu\n",
 465                 s->deactivate_remote_frees, s->free_frozen,
 466                 s->deactivate_remote_frees * 100 / total_alloc,
 467                 s->free_frozen * 100 / total_free);
 468
 469         printf("Total                %8lu %8lu\n\n", total_alloc, total_free);
 470
 471         if (s->cpuslab_flush)
 472                 printf("Flushes %8lu\n", s->cpuslab_flush);
 473
 474         total = s->deactivate_full + s->deactivate_empty +
 475                         s->deactivate_to_head + s->deactivate_to_tail + s->deactivate_bypass;
 476
 477         if (total) {
 478                 printf("\nSlab Deactivation             Ocurrences  %%\n");
 479                 printf("-------------------------------------------------\n");
 480                 printf("Slab full                     %7lu  %3lu%%\n",
 481                         s->deactivate_full, (s->deactivate_full * 100) / total);
 482                 printf("Slab empty                    %7lu  %3lu%%\n",
 483                         s->deactivate_empty, (s->deactivate_empty * 100) / total);
 484                 printf("Moved to head of partial list %7lu  %3lu%%\n",
 485                         s->deactivate_to_head, (s->deactivate_to_head * 100) / total);
 486                 printf("Moved to tail of partial list %7lu  %3lu%%\n",
 487                         s->deactivate_to_tail, (s->deactivate_to_tail * 100) / total);
 488                 printf("Deactivation bypass           %7lu  %3lu%%\n",
 489                         s->deactivate_bypass, (s->deactivate_bypass * 100) / total);
 490                 printf("Refilled from foreign frees   %7lu  %3lu%%\n",
 491                         s->alloc_refill, (s->alloc_refill * 100) / total);
 492                 printf("Node mismatch                 %7lu  %3lu%%\n",
 493                         s->alloc_node_mismatch, (s->alloc_node_mismatch * 100) / total);
 494         }
 495
 496         if (s->cmpxchg_double_fail || s->cmpxchg_double_cpu_fail)
 497                 printf("\nCmpxchg_double Looping\n------------------------\n");
 498                 printf("Locked Cmpxchg Double redos   %lu\nUnlocked Cmpxchg Double redos %lu\n",
 499                         s->cmpxchg_double_fail, s->cmpxchg_double_cpu_fail);
 500 }
 501
 502 static void report(struct slabinfo *s)
 503 {
 504         if (strcmp(s->name, "*") == 0)
 505                 return;
 506
 507         printf("\nSlabcache: %-20s  Aliases: %2d Order : %2d Objects: %lu\n",
 508                 s->name, s->aliases, s->order, s->objects);
 509         if (s->hwcache_align)
 510                 printf("** Hardware cacheline aligned\n");
 511         if (s->cache_dma)
 512                 printf("** Memory is allocated in a special DMA zone\n");
 513         if (s->destroy_by_rcu)
 514                 printf("** Slabs are destroyed via RCU\n");
 515         if (s->reclaim_account)
 516                 printf("** Reclaim accounting active\n");
 517
 518         printf("\nSizes (bytes)     Slabs              Debug                Memory\n");
 519         printf("------------------------------------------------------------------------\n");
 520         printf("Object : %7d  Total  : %7ld   Sanity Checks : %s  Total: %7ld\n",
 521                         s->object_size, s->slabs, onoff(s->sanity_checks),
 522                         s->slabs * (page_size << s->order));
 523         printf("SlabObj: %7d  Full   : %7ld   Redzoning     : %s  Used : %7ld\n",
 524                         s->slab_size, s->slabs - s->partial - s->cpu_slabs,
 525                         onoff(s->red_zone), s->objects * s->object_size);
 526         printf("SlabSiz: %7d  Partial: %7ld   Poisoning     : %s  Loss : %7ld\n",
 527                         page_size << s->order, s->partial, onoff(s->poison),
 528                         s->slabs * (page_size << s->order) - s->objects * s->object_size);
 529         printf("Loss   : %7d  CpuSlab: %7d   Tracking      : %s  Lalig: %7ld\n",
 530                         s->slab_size - s->object_size, s->cpu_slabs, onoff(s->store_user),
 531                         (s->slab_size - s->object_size) * s->objects);
 532         printf("Align  : %7d  Objects: %7d   Tracing       : %s  Lpadd: %7ld\n",
 533                         s->align, s->objs_per_slab, onoff(s->trace),
 534                         ((page_size << s->order) - s->objs_per_slab * s->slab_size) *
 535                         s->slabs);
 536
 537         ops(s);
 538         show_tracking(s);
 539         slab_numa(s, 1);
 540         slab_stats(s);
 541 }
 542
 543 static void slabcache(struct slabinfo *s)
 544 {
 545         char size_str[20];
 546         char dist_str[40];
 547         char flags[20];
 548         char *p = flags;
 549
 550         if (strcmp(s->name, "*") == 0)
 551                 return;
 552
 553         if (actual_slabs == 1) {
 554                 report(s);
 555                 return;
 556         }
 557
 558         if (skip_zero && !show_empty && !s->slabs)
 559                 return;
 560
 561         if (show_empty && s->slabs)
 562                 return;
 563
 564         store_size(size_str, slab_size(s));
 565         snprintf(dist_str, 40, "%lu/%lu/%d", s->slabs - s->cpu_slabs,
 566                                                 s->partial, s->cpu_slabs);
 567
 568         if (!line++)
 569                 first_line();
 570
 571         if (s->aliases)
 572                 *p++ = '*';
 573         if (s->cache_dma)
 574                 *p++ = 'd';
 575         if (s->hwcache_align)
 576                 *p++ = 'A';
 577         if (s->poison)
 578                 *p++ = 'P';
 579         if (s->reclaim_account)
 580                 *p++ = 'a';
 581         if (s->red_zone)
 582                 *p++ = 'Z';
 583         if (s->sanity_checks)
 584                 *p++ = 'F';
 585         if (s->store_user)
 586                 *p++ = 'U';
 587         if (s->trace)
 588                 *p++ = 'T';
 589
 590         *p = 0;
 591         if (show_activity) {
 592                 unsigned long total_alloc;
 593                 unsigned long total_free;
 594
 595                 total_alloc = s->alloc_fastpath + s->alloc_slowpath;
 596                 total_free = s->free_fastpath + s->free_slowpath;
 597
 598                 printf("%-21s %8ld %10ld %10ld %3ld %3ld %5ld %1d %4ld %4ld\n",
 599                         s->name, s->objects,
 600                         total_alloc, total_free,
 601                         total_alloc ? (s->alloc_fastpath * 100 / total_alloc) : 0,
 602                         total_free ? (s->free_fastpath * 100 / total_free) : 0,
 603                         s->order_fallback, s->order, s->cmpxchg_double_fail,
 604                         s->cmpxchg_double_cpu_fail);
 605         }
 606         else
 607                 printf("%-21s %8ld %7d %8s %14s %4d %1d %3ld %3ld %s\n",
 608                         s->name, s->objects, s->object_size, size_str, dist_str,
 609                         s->objs_per_slab, s->order,
 610                         s->slabs ? (s->partial * 100) / s->slabs : 100,
 611                         s->slabs ? (s->objects * s->object_size * 100) /
 612                                 (s->slabs * (page_size << s->order)) : 100,
 613                         flags);
 614 }
 615
 616 /*
 617  * Analyze debug options. Return false if something is amiss.
 618  */
 619 static int debug_opt_scan(char *opt)
 620 {
 621         if (!opt || !opt[0] || strcmp(opt, "-") == 0)
 622                 return 1;
 623
 624         if (strcasecmp(opt, "a") == 0) {
 625                 sanity = 1;
 626                 poison = 1;
 627                 redzone = 1;
 628                 tracking = 1;
 629                 return 1;
 630         }
 631
 632         for ( ; *opt; opt++)
 633                 switch (*opt) {
 634                 case 'F' : case 'f':
 635                         if (sanity)
 636                                 return 0;
 637                         sanity = 1;
 638                         break;
 639                 case 'P' : case 'p':
 640                         if (poison)
 641                                 return 0;
 642                         poison = 1;
 643                         break;
 644
 645                 case 'Z' : case 'z':
 646                         if (redzone)
 647                                 return 0;
 648                         redzone = 1;
 649                         break;
 650
 651                 case 'U' : case 'u':
 652                         if (tracking)
 653                                 return 0;
 654                         tracking = 1;
 655                         break;
 656
 657                 case 'T' : case 't':
 658                         if (tracing)
 659                                 return 0;
 660                         tracing = 1;
 661                         break;
 662                 default:
 663                         return 0;
 664                 }
 665         return 1;
 666 }
 667
 668 static int slab_empty(struct slabinfo *s)
 669 {
 670         if (s->objects > 0)
 671                 return 0;
 672
 673         /*
 674          * We may still have slabs even if there are no objects. Shrinking will
 675          * remove them.
 676          */
 677         if (s->slabs != 0)
 678                 set_obj(s, "shrink", 1);
 679
 680         return 1;
 681 }
 682
 683 static void slab_debug(struct slabinfo *s)
 684 {
 685         if (strcmp(s->name, "*") == 0)
 686                 return;
 687
 688         if (sanity && !s->sanity_checks) {
 689                 set_obj(s, "sanity", 1);
 690         }
 691         if (!sanity && s->sanity_checks) {
 692                 if (slab_empty(s))
 693                         set_obj(s, "sanity", 0);
 694                 else
 695                         fprintf(stderr, "%s not empty cannot disable sanity checks\n", s->name);
 696         }
 697         if (redzone && !s->red_zone) {
 698                 if (slab_empty(s))
 699                         set_obj(s, "red_zone", 1);
 700                 else
 701                         fprintf(stderr, "%s not empty cannot enable redzoning\n", s->name);
 702         }
 703         if (!redzone && s->red_zone) {
 704                 if (slab_empty(s))
 705                         set_obj(s, "red_zone", 0);
 706                 else
 707                         fprintf(stderr, "%s not empty cannot disable redzoning\n", s->name);
 708         }
 709         if (poison && !s->poison) {
 710                 if (slab_empty(s))
 711                         set_obj(s, "poison", 1);
 712                 else
 713                         fprintf(stderr, "%s not empty cannot enable poisoning\n", s->name);
 714         }
 715         if (!poison && s->poison) {
 716                 if (slab_empty(s))
 717                         set_obj(s, "poison", 0);
 718                 else
 719                         fprintf(stderr, "%s not empty cannot disable poisoning\n", s->name);
 720         }
 721         if (tracking && !s->store_user) {
 722                 if (slab_empty(s))
 723                         set_obj(s, "store_user", 1);
 724                 else
 725                         fprintf(stderr, "%s not empty cannot enable tracking\n", s->name);
 726         }
 727         if (!tracking && s->store_user) {
 728                 if (slab_empty(s))
 729                         set_obj(s, "store_user", 0);
 730                 else
 731                         fprintf(stderr, "%s not empty cannot disable tracking\n", s->name);
 732         }
 733         if (tracing && !s->trace) {
 734                 if (slabs == 1)
 735                         set_obj(s, "trace", 1);
 736                 else
 737                         fprintf(stderr, "%s can only enable trace for one slab at a time\n", s->name);
 738         }
 739         if (!tracing && s->trace)
 740                 set_obj(s, "trace", 1);
 741 }
 742
 743 static void totals(void)
 744 {
 745         struct slabinfo *s;
 746
 747         int used_slabs = 0;
 748         char b1[20], b2[20], b3[20], b4[20];
 749         unsigned long long max = 1ULL << 63;
 750
 751         /* Object size */
 752         unsigned long long min_objsize = max, max_objsize = 0, avg_objsize;
 753
 754         /* Number of partial slabs in a slabcache */
 755         unsigned long long min_partial = max, max_partial = 0,
 756                                 avg_partial, total_partial = 0;
 757
 758         /* Number of slabs in a slab cache */
 759         unsigned long long min_slabs = max, max_slabs = 0,
 760                                 avg_slabs, total_slabs = 0;
 761
 762         /* Size of the whole slab */
 763         unsigned long long min_size = max, max_size = 0,
 764                                 avg_size, total_size = 0;
 765
 766         /* Bytes used for object storage in a slab */
 767         unsigned long long min_used = max, max_used = 0,
 768                                 avg_used, total_used = 0;
 769
 770         /* Waste: Bytes used for alignment and padding */
 771         unsigned long long min_waste = max, max_waste = 0,
 772                                 avg_waste, total_waste = 0;
 773         /* Number of objects in a slab */
 774         unsigned long long min_objects = max, max_objects = 0,
 775                                 avg_objects, total_objects = 0;
 776         /* Waste per object */
 777         unsigned long long min_objwaste = max,
 778                                 max_objwaste = 0, avg_objwaste,
 779                                 total_objwaste = 0;
 780
 781         /* Memory per object */
 782         unsigned long long min_memobj = max,
 783                                 max_memobj = 0, avg_memobj,
 784                                 total_objsize = 0;
 785
 786         /* Percentage of partial slabs per slab */
 787         unsigned long min_ppart = 100, max_ppart = 0,
 788                                 avg_ppart, total_ppart = 0;
 789
 790         /* Number of objects in partial slabs */
 791         unsigned long min_partobj = max, max_partobj = 0,
 792                                 avg_partobj, total_partobj = 0;
 793
 794         /* Percentage of partial objects of all objects in a slab */
 795         unsigned long min_ppartobj = 100, max_ppartobj = 0,
 796                                 avg_ppartobj, total_ppartobj = 0;
 797
 798
 799         for (s = slabinfo; s < slabinfo + slabs; s++) {
 800                 unsigned long long size;
 801                 unsigned long used;
 802                 unsigned long long wasted;
 803                 unsigned long long objwaste;
 804                 unsigned long percentage_partial_slabs;
 805                 unsigned long percentage_partial_objs;
 806
 807                 if (!s->slabs || !s->objects)
 808                         continue;
 809
 810                 used_slabs++;
 811
 812                 size = slab_size(s);
 813                 used = s->objects * s->object_size;
 814                 wasted = size - used;
 815                 objwaste = s->slab_size - s->object_size;
 816
 817                 percentage_partial_slabs = s->partial * 100 / s->slabs;
 818                 if (percentage_partial_slabs > 100)
 819                         percentage_partial_slabs = 100;
 820
 821                 percentage_partial_objs = s->objects_partial * 100
 822                                                         / s->objects;
 823
 824                 if (percentage_partial_objs > 100)
 825                         percentage_partial_objs = 100;
 826
 827                 if (s->object_size < min_objsize)
 828                         min_objsize = s->object_size;
 829                 if (s->partial < min_partial)
 830                         min_partial = s->partial;
 831                 if (s->slabs < min_slabs)
 832                         min_slabs = s->slabs;
 833                 if (size < min_size)
 834                         min_size = size;
 835                 if (wasted < min_waste)
 836                         min_waste = wasted;
 837                 if (objwaste < min_objwaste)
 838                         min_objwaste = objwaste;
 839                 if (s->objects < min_objects)
 840                         min_objects = s->objects;
 841                 if (used < min_used)
 842                         min_used = used;
 843                 if (s->objects_partial < min_partobj)
 844                         min_partobj = s->objects_partial;
 845                 if (percentage_partial_slabs < min_ppart)
 846                         min_ppart = percentage_partial_slabs;
 847                 if (percentage_partial_objs < min_ppartobj)
 848                         min_ppartobj = percentage_partial_objs;
 849                 if (s->slab_size < min_memobj)
 850                         min_memobj = s->slab_size;
 851
 852                 if (s->object_size > max_objsize)
 853                         max_objsize = s->object_size;
 854                 if (s->partial > max_partial)
 855                         max_partial = s->partial;
 856                 if (s->slabs > max_slabs)
 857                         max_slabs = s->slabs;
 858                 if (size > max_size)
 859                         max_size = size;
 860                 if (wasted > max_waste)
 861                         max_waste = wasted;
 862                 if (objwaste > max_objwaste)
 863                         max_objwaste = objwaste;
 864                 if (s->objects > max_objects)
 865                         max_objects = s->objects;
 866                 if (used > max_used)
 867                         max_used = used;
 868                 if (s->objects_partial > max_partobj)
 869                         max_partobj = s->objects_partial;
 870                 if (percentage_partial_slabs > max_ppart)
 871                         max_ppart = percentage_partial_slabs;
 872                 if (percentage_partial_objs > max_ppartobj)
 873                         max_ppartobj = percentage_partial_objs;
 874                 if (s->slab_size > max_memobj)
 875                         max_memobj = s->slab_size;
 876
 877                 total_partial += s->partial;
 878                 total_slabs += s->slabs;
 879                 total_size += size;
 880                 total_waste += wasted;
 881
 882                 total_objects += s->objects;
 883                 total_used += used;
 884                 total_partobj += s->objects_partial;
 885                 total_ppart += percentage_partial_slabs;
 886                 total_ppartobj += percentage_partial_objs;
 887
 888                 total_objwaste += s->objects * objwaste;
 889                 total_objsize += s->objects * s->slab_size;
 890         }
 891
 892         if (!total_objects) {
 893                 printf("No objects\n");
 894                 return;
 895         }
 896         if (!used_slabs) {
 897                 printf("No slabs\n");
 898                 return;
 899         }
 900
 901         /* Per slab averages */
 902         avg_partial = total_partial / used_slabs;
 903         avg_slabs = total_slabs / used_slabs;
 904         avg_size = total_size / used_slabs;
 905         avg_waste = total_waste / used_slabs;
 906
 907         avg_objects = total_objects / used_slabs;
 908         avg_used = total_used / used_slabs;
 909         avg_partobj = total_partobj / used_slabs;
 910         avg_ppart = total_ppart / used_slabs;
 911         avg_ppartobj = total_ppartobj / used_slabs;
 912
 913         /* Per object object sizes */
 914         avg_objsize = total_used / total_objects;
 915         avg_objwaste = total_objwaste / total_objects;
 916         avg_partobj = total_partobj * 100 / total_objects;
 917         avg_memobj = total_objsize / total_objects;
 918
 919         printf("Slabcache Totals\n");
 920         printf("----------------\n");
 921         printf("Slabcaches : %3d      Aliases  : %3d->%-3d Active: %3d\n",
 922                         slabs, aliases, alias_targets, used_slabs);
 923
 924         store_size(b1, total_size);store_size(b2, total_waste);
 925         store_size(b3, total_waste * 100 / total_used);
 926         printf("Memory used: %6s   # Loss   : %6s   MRatio:%6s%%\n", b1, b2, b3);
 927
 928         store_size(b1, total_objects);store_size(b2, total_partobj);
 929         store_size(b3, total_partobj * 100 / total_objects);
 930         printf("# Objects  : %6s   # PartObj: %6s   ORatio:%6s%%\n", b1, b2, b3);
 931
 932         printf("\n");
 933         printf("Per Cache    Average         Min         Max       Total\n");
 934         printf("---------------------------------------------------------\n");
 935
 936         store_size(b1, avg_objects);store_size(b2, min_objects);
 937         store_size(b3, max_objects);store_size(b4, total_objects);
 938         printf("#Objects  %10s  %10s  %10s  %10s\n",
 939                         b1,     b2,     b3,     b4);
 940
 941         store_size(b1, avg_slabs);store_size(b2, min_slabs);
 942         store_size(b3, max_slabs);store_size(b4, total_slabs);
 943         printf("#Slabs    %10s  %10s  %10s  %10s\n",
 944                         b1,     b2,     b3,     b4);
 945
 946         store_size(b1, avg_partial);store_size(b2, min_partial);
 947         store_size(b3, max_partial);store_size(b4, total_partial);
 948         printf("#PartSlab %10s  %10s  %10s  %10s\n",
 949                         b1,     b2,     b3,     b4);
 950         store_size(b1, avg_ppart);store_size(b2, min_ppart);
 951         store_size(b3, max_ppart);
 952         store_size(b4, total_partial * 100  / total_slabs);
 953         printf("%%PartSlab%10s%% %10s%% %10s%% %10s%%\n",
 954                         b1,     b2,     b3,     b4);
 955
 956         store_size(b1, avg_partobj);store_size(b2, min_partobj);
 957         store_size(b3, max_partobj);
 958         store_size(b4, total_partobj);
 959         printf("PartObjs  %10s  %10s  %10s  %10s\n",
 960                         b1,     b2,     b3,     b4);
 961
 962         store_size(b1, avg_ppartobj);store_size(b2, min_ppartobj);
 963         store_size(b3, max_ppartobj);
 964         store_size(b4, total_partobj * 100 / total_objects);
 965         printf("%% PartObj%10s%% %10s%% %10s%% %10s%%\n",
 966                         b1,     b2,     b3,     b4);
 967
 968         store_size(b1, avg_size);store_size(b2, min_size);
 969         store_size(b3, max_size);store_size(b4, total_size);
 970         printf("Memory    %10s  %10s  %10s  %10s\n",
 971                         b1,     b2,     b3,     b4);
 972
 973         store_size(b1, avg_used);store_size(b2, min_used);
 974         store_size(b3, max_used);store_size(b4, total_used);
 975         printf("Used      %10s  %10s  %10s  %10s\n",
 976                         b1,     b2,     b3,     b4);
 977
 978         store_size(b1, avg_waste);store_size(b2, min_waste);
 979         store_size(b3, max_waste);store_size(b4, total_waste);
 980         printf("Loss      %10s  %10s  %10s  %10s\n",
 981                         b1,     b2,     b3,     b4);
 982
 983         printf("\n");
 984         printf("Per Object   Average         Min         Max\n");
 985         printf("---------------------------------------------\n");
 986
 987         store_size(b1, avg_memobj);store_size(b2, min_memobj);
 988         store_size(b3, max_memobj);
 989         printf("Memory    %10s  %10s  %10s\n",
 990                         b1,     b2,     b3);
 991         store_size(b1, avg_objsize);store_size(b2, min_objsize);
 992         store_size(b3, max_objsize);
 993         printf("User      %10s  %10s  %10s\n",
 994                         b1,     b2,     b3);
 995
 996         store_size(b1, avg_objwaste);store_size(b2, min_objwaste);
 997         store_size(b3, max_objwaste);
 998         printf("Loss      %10s  %10s  %10s\n",
 999                         b1,     b2,     b3);
1000 }
1001
1002 static void sort_slabs(void)
1003 {
1004         struct slabinfo *s1,*s2;
1005
1006         for (s1 = slabinfo; s1 < slabinfo + slabs; s1++) {
1007                 for (s2 = s1 + 1; s2 < slabinfo + slabs; s2++) {
1008                         int result;
1009
1010                         if (sort_size)
1011                                 result = slab_size(s1) < slab_size(s2);
1012                         else if (sort_active)
1013                                 result = slab_activity(s1) < slab_activity(s2);
1014                         else
1015                                 result = strcasecmp(s1->name, s2->name);
1016
1017                         if (show_inverted)
1018                                 result = -result;
1019
1020                         if (result > 0) {
1021                                 struct slabinfo t;
1022
1023                                 memcpy(&t, s1, sizeof(struct slabinfo));
1024                                 memcpy(s1, s2, sizeof(struct slabinfo));
1025                                 memcpy(s2, &t, sizeof(struct slabinfo));
1026                         }
1027                 }
1028         }
1029 }
1030
1031 static void sort_aliases(void)
1032 {
1033         struct aliasinfo *a1,*a2;
1034
1035         for (a1 = aliasinfo; a1 < aliasinfo + aliases; a1++) {
1036                 for (a2 = a1 + 1; a2 < aliasinfo + aliases; a2++) {
1037                         char *n1, *n2;
1038
1039                         n1 = a1->name;
1040                         n2 = a2->name;
1041                         if (show_alias && !show_inverted) {
1042                                 n1 = a1->ref;
1043                                 n2 = a2->ref;
1044                         }
1045                         if (strcasecmp(n1, n2) > 0) {
1046                                 struct aliasinfo t;
1047
1048                                 memcpy(&t, a1, sizeof(struct aliasinfo));
1049                                 memcpy(a1, a2, sizeof(struct aliasinfo));
1050                                 memcpy(a2, &t, sizeof(struct aliasinfo));
1051                         }
1052                 }
1053         }
1054 }
1055
1056 static void link_slabs(void)
1057 {
1058         struct aliasinfo *a;
1059         struct slabinfo *s;
1060
1061         for (a = aliasinfo; a < aliasinfo + aliases; a++) {
1062
1063                 for (s = slabinfo; s < slabinfo + slabs; s++)
1064                         if (strcmp(a->ref, s->name) == 0) {
1065                                 a->slab = s;
1066                                 s->refs++;
1067                                 break;
1068                         }
1069                 if (s == slabinfo + slabs)
1070                         fatal("Unresolved alias %s\n", a->ref);
1071         }
1072 }
1073
1074 static void alias(void)
1075 {
1076         struct aliasinfo *a;
1077         char *active = NULL;
1078
1079         sort_aliases();
1080         link_slabs();
1081
1082         for(a = aliasinfo; a < aliasinfo + aliases; a++) {
1083
1084                 if (!show_single_ref && a->slab->refs == 1)
1085                         continue;
1086
1087                 if (!show_inverted) {
1088                         if (active) {
1089                                 if (strcmp(a->slab->name, active) == 0) {
1090                                         printf(" %s", a->name);
1091                                         continue;
1092                                 }
1093                         }
1094                         printf("\n%-12s <- %s", a->slab->name, a->name);
1095                         active = a->slab->name;
1096                 }
1097                 else
1098                         printf("%-20s -> %s\n", a->name, a->slab->name);
1099         }
1100         if (active)
1101                 printf("\n");
1102 }
1103
1104
1105 static void rename_slabs(void)
1106 {
1107         struct slabinfo *s;
1108         struct aliasinfo *a;
1109
1110         for (s = slabinfo; s < slabinfo + slabs; s++) {
1111                 if (*s->name != ':')
1112                         continue;
1113
1114                 if (s->refs > 1 && !show_first_alias)
1115                         continue;
1116
1117                 a = find_one_alias(s);
1118
1119                 if (a)
1120                         s->name = a->name;
1121                 else {
1122                         s->name = "*";
1123                         actual_slabs--;
1124                 }
1125         }
1126 }
1127
1128 static int slab_mismatch(char *slab)
1129 {
1130         return regexec(&pattern, slab, 0, NULL, 0);
1131 }
1132
1133 static void read_slab_dir(void)
1134 {
1135         DIR *dir;
1136         struct dirent *de;
1137         struct slabinfo *slab = slabinfo;
1138         struct aliasinfo *alias = aliasinfo;
1139         char *p;
1140         char *t;
1141         int count;
1142
1143         if (chdir("/sys/kernel/slab") && chdir("/sys/slab"))
1144                 fatal("SYSFS support for SLUB not active\n");
1145
1146         dir = opendir(".");
1147         while ((de = readdir(dir))) {
1148                 if (de->d_name[0] == '.' ||
1149                         (de->d_name[0] != ':' && slab_mismatch(de->d_name)))
1150                                 continue;
1151                 switch (de->d_type) {
1152                    case DT_LNK:
1153                         alias->name = strdup(de->d_name);
1154                         count = readlink(de->d_name, buffer, sizeof(buffer)-1);
1155
1156                         if (count < 0)
1157                                 fatal("Cannot read symlink %s\n", de->d_name);
1158
1159                         buffer[count] = 0;
1160                         p = buffer + count;
1161                         while (p > buffer && p[-1] != '/')
1162                                 p--;
1163                         alias->ref = strdup(p);
1164                         alias++;
1165                         break;
1166                    case DT_DIR:
1167                         if (chdir(de->d_name))
1168                                 fatal("Unable to access slab %s\n", slab->name);
1169                         slab->name = strdup(de->d_name);
1170                         slab->alias = 0;
1171                         slab->refs = 0;
1172                         slab->aliases = get_obj("aliases");
1173                         slab->align = get_obj("align");
1174                         slab->cache_dma = get_obj("cache_dma");
1175                         slab->cpu_slabs = get_obj("cpu_slabs");
1176                         slab->destroy_by_rcu = get_obj("destroy_by_rcu");
1177                         slab->hwcache_align = get_obj("hwcache_align");
1178                         slab->object_size = get_obj("object_size");
1179                         slab->objects = get_obj("objects");
1180                         slab->objects_partial = get_obj("objects_partial");
1181                         slab->objects_total = get_obj("objects_total");
1182                         slab->objs_per_slab = get_obj("objs_per_slab");
1183                         slab->order = get_obj("order");
1184                         slab->partial = get_obj("partial");
1185                         slab->partial = get_obj_and_str("partial", &t);
1186                         decode_numa_list(slab->numa_partial, t);
1187                         free(t);
1188                         slab->poison = get_obj("poison");
1189                         slab->reclaim_account = get_obj("reclaim_account");
1190                         slab->red_zone = get_obj("red_zone");
1191                         slab->sanity_checks = get_obj("sanity_checks");
1192                         slab->slab_size = get_obj("slab_size");
1193                         slab->slabs = get_obj_and_str("slabs", &t);
1194                         decode_numa_list(slab->numa, t);
1195                         free(t);
1196                         slab->store_user = get_obj("store_user");
1197                         slab->trace = get_obj("trace");
1198                         slab->alloc_fastpath = get_obj("alloc_fastpath");
1199                         slab->alloc_slowpath = get_obj("alloc_slowpath");
1200                         slab->free_fastpath = get_obj("free_fastpath");
1201                         slab->free_slowpath = get_obj("free_slowpath");
1202                         slab->free_frozen= get_obj("free_frozen");
1203                         slab->free_add_partial = get_obj("free_add_partial");
1204                         slab->free_remove_partial = get_obj("free_remove_partial");
1205                         slab->alloc_from_partial = get_obj("alloc_from_partial");
1206                         slab->alloc_slab = get_obj("alloc_slab");
1207                         slab->alloc_refill = get_obj("alloc_refill");
1208                         slab->free_slab = get_obj("free_slab");
1209                         slab->cpuslab_flush = get_obj("cpuslab_flush");
1210                         slab->deactivate_full = get_obj("deactivate_full");
1211                         slab->deactivate_empty = get_obj("deactivate_empty");
1212                         slab->deactivate_to_head = get_obj("deactivate_to_head");
1213                         slab->deactivate_to_tail = get_obj("deactivate_to_tail");
1214                         slab->deactivate_remote_frees = get_obj("deactivate_remote_frees");
1215                         slab->order_fallback = get_obj("order_fallback");
1216                         slab->cmpxchg_double_cpu_fail = get_obj("cmpxchg_double_cpu_fail");
1217                         slab->cmpxchg_double_fail = get_obj("cmpxchg_double_fail");
1218                         slab->cpu_partial_alloc = get_obj("cpu_partial_alloc");
1219                         slab->cpu_partial_free = get_obj("cpu_partial_free");
1220                         slab->alloc_node_mismatch = get_obj("alloc_node_mismatch");
1221                         slab->deactivate_bypass = get_obj("deactivate_bypass");
1222                         chdir("..");
1223                         if (slab->name[0] == ':')
1224                                 alias_targets++;
1225                         slab++;
1226                         break;
1227                    default :
1228                         fatal("Unknown file type %lx\n", de->d_type);
1229                 }
1230         }
1231         closedir(dir);
1232         slabs = slab - slabinfo;
1233         actual_slabs = slabs;
1234         aliases = alias - aliasinfo;
1235         if (slabs > MAX_SLABS)
1236                 fatal("Too many slabs\n");
1237         if (aliases > MAX_ALIASES)
1238                 fatal("Too many aliases\n");
1239 }
1240
1241 static void output_slabs(void)
1242 {
1243         struct slabinfo *slab;
1244
1245         for (slab = slabinfo; slab < slabinfo + slabs; slab++) {
1246
1247                 if (slab->alias)
1248                         continue;
1249
1250
1251                 if (show_numa)
1252                         slab_numa(slab, 0);
1253                 else if (show_track)
1254                         show_tracking(slab);
1255                 else if (validate)
1256                         slab_validate(slab);
1257                 else if (shrink)
1258                         slab_shrink(slab);
1259                 else if (set_debug)
1260                         slab_debug(slab);
1261                 else if (show_ops)
1262                         ops(slab);
1263                 else if (show_slab)
1264                         slabcache(slab);
1265                 else if (show_report)
1266                         report(slab);
1267         }
1268 }
1269
1270 struct option opts[] = {
1271         { "aliases", 0, NULL, 'a' },
1272         { "activity", 0, NULL, 'A' },
1273         { "debug", 2, NULL, 'd' },
1274         { "display-activity", 0, NULL, 'D' },
1275         { "empty", 0, NULL, 'e' },
1276         { "first-alias", 0, NULL, 'f' },
1277         { "help", 0, NULL, 'h' },
1278         { "inverted", 0, NULL, 'i'},
1279         { "numa", 0, NULL, 'n' },
1280         { "ops", 0, NULL, 'o' },
1281         { "report", 0, NULL, 'r' },
1282         { "shrink", 0, NULL, 's' },
1283         { "slabs", 0, NULL, 'l' },
1284         { "track", 0, NULL, 't'},
1285         { "validate", 0, NULL, 'v' },
1286         { "zero", 0, NULL, 'z' },
1287         { "1ref", 0, NULL, '1'},
1288         { NULL, 0, NULL, 0 }
1289 };
1290
1291 int main(int argc, char *argv[])
1292 {
1293         int c;
1294         int err;
1295         char *pattern_source;
1296
1297         page_size = getpagesize();
1298
1299         while ((c = getopt_long(argc, argv, "aAd::Defhil1noprstvzTS",
1300                                                 opts, NULL)) != -1)
1301                 switch (c) {
1302                 case '1':
1303                         show_single_ref = 1;
1304                         break;
1305                 case 'a':
1306                         show_alias = 1;
1307                         break;
1308                 case 'A':
1309                         sort_active = 1;
1310                         break;
1311                 case 'd':
1312                         set_debug = 1;
1313                         if (!debug_opt_scan(optarg))
1314                                 fatal("Invalid debug option '%s'\n", optarg);
1315                         break;
1316                 case 'D':
1317                         show_activity = 1;
1318                         break;
1319                 case 'e':
1320                         show_empty = 1;
1321                         break;
1322                 case 'f':
1323                         show_first_alias = 1;
1324                         break;
1325                 case 'h':
1326                         usage();
1327                         return 0;
1328                 case 'i':
1329                         show_inverted = 1;
1330                         break;
1331                 case 'n':
1332                         show_numa = 1;
1333                         break;
1334                 case 'o':
1335                         show_ops = 1;
1336                         break;
1337                 case 'r':
1338                         show_report = 1;
1339                         break;
1340                 case 's':
1341                         shrink = 1;
1342                         break;
1343                 case 'l':
1344                         show_slab = 1;
1345                         break;
1346                 case 't':
1347                         show_track = 1;
1348                         break;
1349                 case 'v':
1350                         validate = 1;
1351                         break;
1352                 case 'z':
1353                         skip_zero = 0;
1354                         break;
1355                 case 'T':
1356                         show_totals = 1;
1357                         break;
1358                 case 'S':
1359                         sort_size = 1;
1360                         break;
1361
1362                 default:
1363                         fatal("%s: Invalid option '%c'\n", argv[0], optopt);
1364
1365         }
1366
1367         if (!show_slab && !show_alias && !show_track && !show_report
1368                 && !validate && !shrink && !set_debug && !show_ops)
1369                         show_slab = 1;
1370
1371         if (argc > optind)
1372                 pattern_source = argv[optind];
1373         else
1374                 pattern_source = ".*";
1375
1376         err = regcomp(&pattern, pattern_source, REG_ICASE|REG_NOSUB);
1377         if (err)
1378                 fatal("%s: Invalid pattern '%s' code %d\n",
1379                         argv[0], pattern_source, err);
1380         read_slab_dir();
1381         if (show_alias)
1382                 alias();
1383         else
1384         if (show_totals)
1385                 totals();
1386         else {
1387                 link_slabs();
1388                 rename_slabs();
1389                 sort_slabs();
1390                 output_slabs();
1391         }
1392         return 0;
1393 }