[PATCH] slab: extract slab order calculation to separate function

[pandora-kernel.git] / mm / mempolicy.c

diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 72f402c..0f1d2b8 100644 (file)
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -93,7 +93,7 @@ static kmem_cache_t *sn_cache;
 
 /* Highest zone. An specific allocation for a zone below that is not
    policied. */
-static int policy_zone;
+int policy_zone = ZONE_DMA;
 
 struct mempolicy default_policy = {
        .refcnt = ATOMIC_INIT(1), /* never free it */
@@ -131,17 +131,8 @@ static struct zonelist *bind_zonelist(nodemask_t *nodes)
        if (!zl)
                return NULL;
        num = 0;
-       for_each_node_mask(nd, *nodes) {
-               int k;
-               for (k = MAX_NR_ZONES-1; k >= 0; k--) {
-                       struct zone *z = &NODE_DATA(nd)->node_zones[k];
-                       if (!z->present_pages)
-                               continue;
-                       zl->zones[num++] = z;
-                       if (k > policy_zone)
-                               policy_zone = k;
-               }
-       }
+       for_each_node_mask(nd, *nodes)
+               zl->zones[num++] = &NODE_DATA(nd)->node_zones[policy_zone];
        zl->zones[num] = NULL;
        return zl;
 }
@@ -785,6 +776,34 @@ static unsigned offset_il_node(struct mempolicy *pol,
        return nid;
 }
 
+/* Determine a node number for interleave */
+static inline unsigned interleave_nid(struct mempolicy *pol,
+                struct vm_area_struct *vma, unsigned long addr, int shift)
+{
+       if (vma) {
+               unsigned long off;
+
+               off = vma->vm_pgoff;
+               off += (addr - vma->vm_start) >> shift;
+               return offset_il_node(pol, vma, off);
+       } else
+               return interleave_nodes(pol);
+}
+
+/* Return a zonelist suitable for a huge page allocation. */
+struct zonelist *huge_zonelist(struct vm_area_struct *vma, unsigned long addr)
+{
+       struct mempolicy *pol = get_vma_policy(current, vma, addr);
+
+       if (pol->policy == MPOL_INTERLEAVE) {
+               unsigned nid;
+
+               nid = interleave_nid(pol, vma, addr, HPAGE_SHIFT);
+               return NODE_DATA(nid)->node_zonelists + gfp_zone(GFP_HIGHUSER);
+       }
+       return zonelist_policy(GFP_HIGHUSER, pol);
+}
+
 /* Allocate a page in interleaved policy.
    Own path because it needs to do special accounting. */
 static struct page *alloc_page_interleave(gfp_t gfp, unsigned order,
@@ -833,15 +852,8 @@ alloc_page_vma(gfp_t gfp, struct vm_area_struct *vma, unsigned long addr)
 
        if (unlikely(pol->policy == MPOL_INTERLEAVE)) {
                unsigned nid;
-               if (vma) {
-                       unsigned long off;
-                       off = vma->vm_pgoff;
-                       off += (addr - vma->vm_start) >> PAGE_SHIFT;
-                       nid = offset_il_node(pol, vma, off);
-               } else {
-                       /* fall back to process interleaving */
-                       nid = interleave_nodes(pol);
-               }
+
+               nid = interleave_nid(pol, vma, addr, PAGE_SHIFT);
                return alloc_page_interleave(gfp, 0, nid);
        }
        return __alloc_pages(gfp, 0, zonelist_policy(gfp, pol));
@@ -939,54 +951,6 @@ void __mpol_free(struct mempolicy *p)
        kmem_cache_free(policy_cache, p);
 }
 
-/*
- * Hugetlb policy. Same as above, just works with node numbers instead of
- * zonelists.
- */
-
-/* Find first node suitable for an allocation */
-int mpol_first_node(struct vm_area_struct *vma, unsigned long addr)
-{
-       struct mempolicy *pol = get_vma_policy(current, vma, addr);
-
-       switch (pol->policy) {
-       case MPOL_DEFAULT:
-               return numa_node_id();
-       case MPOL_BIND:
-               return pol->v.zonelist->zones[0]->zone_pgdat->node_id;
-       case MPOL_INTERLEAVE:
-               return interleave_nodes(pol);
-       case MPOL_PREFERRED:
-               return pol->v.preferred_node >= 0 ?
-                               pol->v.preferred_node : numa_node_id();
-       }
-       BUG();
-       return 0;
-}
-
-/* Find secondary valid nodes for an allocation */
-int mpol_node_valid(int nid, struct vm_area_struct *vma, unsigned long addr)
-{
-       struct mempolicy *pol = get_vma_policy(current, vma, addr);
-
-       switch (pol->policy) {
-       case MPOL_PREFERRED:
-       case MPOL_DEFAULT:
-       case MPOL_INTERLEAVE:
-               return 1;
-       case MPOL_BIND: {
-               struct zone **z;
-               for (z = pol->v.zonelist->zones; *z; z++)
-                       if ((*z)->zone_pgdat->node_id == nid)
-                               return 1;
-               return 0;
-       }
-       default:
-               BUG();
-               return 0;
-       }
-}
-
 /*
  * Shared memory backing store policy support.
  *