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dm: do not set 'discards_supported' in targets that do not need it

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The DM target's 'discards_supported' flag is intended to act as an
override.  Meaning, even if the underlying storage doesn't support
discards the DM target will.

Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Mike Snitzer 2017-11-16 10:22:42 -05:00
parent 8a74d29d54
commit 7dea378b23
2 changed files with 0 additions and 7 deletions
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1
drivers/md/dm-era-target.c
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@ -1513,7 +1513,6 @@ static int era_ctr(struct dm_target *ti, unsigned argc, char **argv)
ti->flush_supported = true;
ti->num_discard_bios = 1;
ti->discards_supported = true;
era->callbacks.congested_fn = era_is_congested;
dm_table_add_target_callbacks(ti->table, &era->callbacks);

6
drivers/md/dm-raid.c
View File

@ -2887,9 +2887,6 @@ static void configure_discard_support(struct raid_set *rs)
bool raid456;
struct dm_target *ti = rs->ti;
/* Assume discards not supported until after checks below. */
ti->discards_supported = false;
/*
* XXX: RAID level 4,5,6 require zeroing for safety.
*/
@ -2914,9 +2911,6 @@ static void configure_discard_support(struct raid_set *rs)
}
}
/* All RAID members properly support discards */
ti->discards_supported = true;
/*
* RAID1 and RAID10 personalities require bio splitting,
* RAID0/4/5/6 don't and process large discard bios properly.