md: Use new topology calls to indicate alignment and I/O sizes

Switch MD over to the new disk_stack_limits() function which checks for
aligment and adjusts preferred I/O sizes when stacking.

Also indicate preferred I/O sizes where applicable.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: NeilBrown <neilb@suse.de>

diff --git a/drivers/md/linear.c b/drivers/md/linear.c
index 15c8b7b..5810fa9 100644 (file)
--- a/drivers/md/linear.c
+++ b/drivers/md/linear.c
@@ -166,8 +166,8 @@ static linear_conf_t *linear_conf(mddev_t *mddev, int raid_disks)
                        rdev->sectors = sectors * mddev->chunk_sectors;
                }
 
-               blk_queue_stack_limits(mddev->queue,
-                                      rdev->bdev->bd_disk->queue);
+               disk_stack_limits(mddev->gendisk, rdev->bdev,
+                                 rdev->data_offset << 9);
                /* as we don't honour merge_bvec_fn, we must never risk
                 * violating it, so limit ->max_sector to one PAGE, as
                 * a one page request is never in violation.

diff --git a/drivers/md/multipath.c b/drivers/md/multipath.c
index cbe368f..237fe3f 100644 (file)
--- a/drivers/md/multipath.c
+++ b/drivers/md/multipath.c
@@ -294,7 +294,8 @@ static int multipath_add_disk(mddev_t *mddev, mdk_rdev_t *rdev)
        for (path = first; path <= last; path++)
                if ((p=conf->multipaths+path)->rdev == NULL) {
                        q = rdev->bdev->bd_disk->queue;
-                       blk_queue_stack_limits(mddev->queue, q);
+                       disk_stack_limits(mddev->gendisk, rdev->bdev,
+                                         rdev->data_offset << 9);
 
                /* as we don't honour merge_bvec_fn, we must never risk
                 * violating it, so limit ->max_sector to one PAGE, as
@@ -463,9 +464,9 @@ static int multipath_run (mddev_t *mddev)
 
                disk = conf->multipaths + disk_idx;
                disk->rdev = rdev;
+               disk_stack_limits(mddev->gendisk, rdev->bdev,
+                                 rdev->data_offset << 9);
 
-               blk_queue_stack_limits(mddev->queue,
-                                      rdev->bdev->bd_disk->queue);
                /* as we don't honour merge_bvec_fn, we must never risk
                 * violating it, not that we ever expect a device with
                 * a merge_bvec_fn to be involved in multipath */

diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c
index ab4a489..335f490 100644 (file)
--- a/drivers/md/raid0.c
+++ b/drivers/md/raid0.c
@@ -170,8 +170,8 @@ static int create_strip_zones(mddev_t *mddev)
                }
                dev[j] = rdev1;
 
-               blk_queue_stack_limits(mddev->queue,
-                                      rdev1->bdev->bd_disk->queue);
+               disk_stack_limits(mddev->gendisk, rdev1->bdev,
+                                 rdev1->data_offset << 9);
                /* as we don't honour merge_bvec_fn, we must never risk
                 * violating it, so limit ->max_sector to one PAGE, as
                 * a one page request is never in violation.
@@ -250,6 +250,11 @@ static int create_strip_zones(mddev_t *mddev)
                       mddev->chunk_sectors << 9);
                goto abort;
        }
+
+       blk_queue_io_min(mddev->queue, mddev->chunk_sectors << 9);
+       blk_queue_io_opt(mddev->queue,
+                        (mddev->chunk_sectors << 9) * mddev->raid_disks);
+
        printk(KERN_INFO "raid0: done.\n");
        mddev->private = conf;
        return 0;

diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index 89939a7..0569efb 100644 (file)
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -1123,8 +1123,8 @@ static int raid1_add_disk(mddev_t *mddev, mdk_rdev_t *rdev)
        for (mirror = first; mirror <= last; mirror++)
                if ( !(p=conf->mirrors+mirror)->rdev) {
 
-                       blk_queue_stack_limits(mddev->queue,
-                                              rdev->bdev->bd_disk->queue);
+                       disk_stack_limits(mddev->gendisk, rdev->bdev,
+                                         rdev->data_offset << 9);
                        /* as we don't honour merge_bvec_fn, we must never risk
                         * violating it, so limit ->max_sector to one PAGE, as
                         * a one page request is never in violation.
@@ -1988,9 +1988,8 @@ static int run(mddev_t *mddev)
                disk = conf->mirrors + disk_idx;
 
                disk->rdev = rdev;
-
-               blk_queue_stack_limits(mddev->queue,
-                                      rdev->bdev->bd_disk->queue);
+               disk_stack_limits(mddev->gendisk, rdev->bdev,
+                                 rdev->data_offset << 9);
                /* as we don't honour merge_bvec_fn, we must never risk
                 * violating it, so limit ->max_sector to one PAGE, as
                 * a one page request is never in violation.

diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index ae12cea..7298a5e 100644 (file)
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -1151,8 +1151,8 @@ static int raid10_add_disk(mddev_t *mddev, mdk_rdev_t *rdev)
        for ( ; mirror <= last ; mirror++)
                if ( !(p=conf->mirrors+mirror)->rdev) {
 
-                       blk_queue_stack_limits(mddev->queue,
-                                              rdev->bdev->bd_disk->queue);
+                       disk_stack_limits(mddev->gendisk, rdev->bdev,
+                                         rdev->data_offset << 9);
                        /* as we don't honour merge_bvec_fn, we must never risk
                         * violating it, so limit ->max_sector to one PAGE, as
                         * a one page request is never in violation.
@@ -2044,7 +2044,7 @@ raid10_size(mddev_t *mddev, sector_t sectors, int raid_disks)
 static int run(mddev_t *mddev)
 {
        conf_t *conf;
-       int i, disk_idx;
+       int i, disk_idx, chunk_size;
        mirror_info_t *disk;
        mdk_rdev_t *rdev;
        int nc, fc, fo;
@@ -2130,6 +2130,14 @@ static int run(mddev_t *mddev)
        spin_lock_init(&conf->device_lock);
        mddev->queue->queue_lock = &conf->device_lock;
 
+       chunk_size = mddev->chunk_sectors << 9;
+       blk_queue_io_min(mddev->queue, chunk_size);
+       if (conf->raid_disks % conf->near_copies)
+               blk_queue_io_opt(mddev->queue, chunk_size * conf->raid_disks);
+       else
+               blk_queue_io_opt(mddev->queue, chunk_size *
+                                (conf->raid_disks / conf->near_copies));
+
        list_for_each_entry(rdev, &mddev->disks, same_set) {
                disk_idx = rdev->raid_disk;
                if (disk_idx >= mddev->raid_disks
@@ -2138,9 +2146,8 @@ static int run(mddev_t *mddev)
                disk = conf->mirrors + disk_idx;
 
                disk->rdev = rdev;
-
-               blk_queue_stack_limits(mddev->queue,
-                                      rdev->bdev->bd_disk->queue);
+               disk_stack_limits(mddev->gendisk, rdev->bdev,
+                                 rdev->data_offset << 9);
                /* as we don't honour merge_bvec_fn, we must never risk
                 * violating it, so limit ->max_sector to one PAGE, as
                 * a one page request is never in violation.

diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index f9f991e..92ef9b6 100644 (file)
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -4452,7 +4452,7 @@ static raid5_conf_t *setup_conf(mddev_t *mddev)
 static int run(mddev_t *mddev)
 {
        raid5_conf_t *conf;
-       int working_disks = 0;
+       int working_disks = 0, chunk_size;
        mdk_rdev_t *rdev;
 
        if (mddev->recovery_cp != MaxSector)
@@ -4607,6 +4607,14 @@ static int run(mddev_t *mddev)
        md_set_array_sectors(mddev, raid5_size(mddev, 0, 0));
 
        blk_queue_merge_bvec(mddev->queue, raid5_mergeable_bvec);
+       chunk_size = mddev->chunk_sectors << 9;
+       blk_queue_io_min(mddev->queue, chunk_size);
+       blk_queue_io_opt(mddev->queue, chunk_size *
+                        (conf->raid_disks - conf->max_degraded));
+
+       list_for_each_entry(rdev, &mddev->disks, same_set)
+               disk_stack_limits(mddev->gendisk, rdev->bdev,
+                                 rdev->data_offset << 9);
 
        return 0;
 abort: