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dm raid: remove unnecessary discard limits for raid10 

BugLink: https://bugs.launchpad.net/bugs/1896578

Commit bcc90d2804 ("md/raid10: improve raid10 discard request")
removes raid10's inability to properly handle large discards.  So
eliminate associated constraint from dm-raid's raid10 support.

Signed-off-by: Mike Snitzer <snitzer@redhat.com>
(cherry picked from commit f0e90b6c66)
Signed-off-by: Matthew Ruffell <matthew.ruffell@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Acked-by: Kelsey Skunberg <kelsey.skunberg@canonical.com>
Signed-off-by: Ian May <ian.may@canonical.com>
This commit is contained in:
Mike Snitzer 2020-10-29 16:07:37 +13:00 committed by Stefan Bader
parent 4fc36ad7b4
commit 3f06dcde4f
1 changed files with 0 additions and 11 deletions
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11
drivers/md/dm-raid.c
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@ -3742,17 +3742,6 @@ 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));
/*
* RAID10 personality requires bio splitting,
* RAID0/1/4/5/6 don't and process large discard bios properly.
*/
if (rs_is_raid10(rs)) {
limits->discard_granularity = max(chunk_size_bytes,
limits->discard_granularity);
limits->max_discard_sectors = min_not_zero(rs->md.chunk_sectors,
limits->max_discard_sectors);
}
}
static void raid_postsuspend(struct dm_target *ti)