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authorHeinz Mauelshagen <heinzm@redhat.com>2016-07-19 13:16:24 +0200
committerMike Snitzer <snitzer@redhat.com>2016-07-19 11:37:08 -0400
commit89d3d9a1e38a6bd453038cfdc7e1576ef2d19719 (patch)
treeacafef3a5b3713da5c702c9b7ba95a7a4a33da12 /drivers/md/dm-raid.c
parent094f394df6a33f959888d445b362a9086823a2fb (diff)
downloadop-kernel-dev-89d3d9a1e38a6bd453038cfdc7e1576ef2d19719.zip
op-kernel-dev-89d3d9a1e38a6bd453038cfdc7e1576ef2d19719.tar.gz
dm raid: fix random optimal_io_size for raid0
raid_io_hints() was retrieving the number of data stripes used for the calculation of io_opt from struct r5conf, which is not defined for raid0 mappings. Base the calculation on the in-core raid_set structure instead. Also, adjust to use to_bytes() for the sector -> bytes conversion throughout. Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/dm-raid.c')
-rw-r--r--drivers/md/dm-raid.c7
1 files changed, 3 insertions, 4 deletions
diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c
index 10c136f..8498354 100644
--- a/drivers/md/dm-raid.c
+++ b/drivers/md/dm-raid.c
@@ -904,7 +904,7 @@ static int validate_region_size(struct raid_set *rs, unsigned long region_size)
/*
* Convert sectors to bytes.
*/
- rs->md.bitmap_info.chunksize = (region_size << 9);
+ rs->md.bitmap_info.chunksize = to_bytes(region_size);
return 0;
}
@@ -3368,11 +3368,10 @@ static int raid_iterate_devices(struct dm_target *ti,
static void raid_io_hints(struct dm_target *ti, struct queue_limits *limits)
{
struct raid_set *rs = ti->private;
- unsigned int chunk_size = rs->md.chunk_sectors << 9;
- struct r5conf *conf = rs->md.private;
+ unsigned int chunk_size = to_bytes(rs->md.chunk_sectors);
blk_limits_io_min(limits, chunk_size);
- blk_limits_io_opt(limits, chunk_size * (conf->raid_disks - conf->max_degraded));
+ blk_limits_io_opt(limits, chunk_size * mddev_data_stripes(rs));
}
static void raid_presuspend(struct dm_target *ti)
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