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dm raid: remove unnecessary discard limits for raid0 and raid10 

Commit 29efc390b9 ("md/md0: optimize raid0 discard handling") and
commit d30588b273 ("md/raid10: improve raid10 discard request")
remove MD raid0's and raid10's inability to properly handle large
discards. So eliminate associated constraints from dm-raid's support.

Depends-on: 29efc390b9 ("md/md0: optimize raid0 discard handling")
Depends-on: d30588b273 ("md/raid10: improve raid10 discard request")
Reported-by: Matthew Ruffell <matthew.ruffell@canonical.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Mike Snitzer 2021-04-30 14:38:37 -04:00
parent 8e947c8f4a
commit ca4a4e9a55
1 changed files with 0 additions and 9 deletions
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9
drivers/md/dm-raid.c
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@ -3750,15 +3750,6 @@ static void raid_io_hints(struct dm_target *ti, struct queue_limits *limits)
blk_limits_io_min(limits, chunk_size_bytes);
blk_limits_io_opt(limits, chunk_size_bytes * mddev_data_stripes(rs));
/*
* RAID0 and RAID10 personalities require bio splitting,
* RAID1/4/5/6 don't and process large discard bios properly.
*/
if (rs_is_raid0(rs) || rs_is_raid10(rs)) {
limits->discard_granularity = chunk_size_bytes;
limits->max_discard_sectors = rs->md.chunk_sectors;
}
}
static void raid_postsuspend(struct dm_target *ti)