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

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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>
This commit is contained in:
Martin K. Petersen
2009-07-01 11:13:45 +10:00
committed by NeilBrown
parent 5a4f13fad1
commit 8f6c2e4b32
6 changed files with 39 additions and 19 deletions
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19
drivers/md/raid10.c
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@@ -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.