GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-07-23 07:12:09 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

dm: eliminate 'split_discard_bios' flag from DM target interface

Browse source 
There is no need to have DM core split discards on behalf of a DM target
now that blk_queue_split() handles splitting discards based on the
queue_limits.  A DM target just needs to set max_discard_sectors,
discard_granularity, etc, in queue_limits.

Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Mike Snitzer 2019-01-18 14:19:26 -05:00
parent 568c73a355
commit 61697a6abd
7 changed files with 17 additions and 35 deletions
Download patch file Download diff file Expand all files Collapse all files

14
drivers/md/dm-raid.c
View file

@ -2986,11 +2986,6 @@ static void configure_discard_support(struct raid_set *rs)
}
}
/*
* RAID1 and RAID10 personalities require bio splitting,
* RAID0/4/5/6 don't and process large discard bios properly.
*/
ti->split_discard_bios = !!(rs_is_raid1(rs) || rs_is_raid10(rs));
ti->num_discard_bios = 1;
}
@ -3747,6 +3742,15 @@ static void raid_io_hints(struct dm_target *ti, struct queue_limits *limits)
blk_limits_io_min(limits, chunk_size);
blk_limits_io_opt(limits, chunk_size * mddev_data_stripes(rs));
/*
* RAID1 and RAID10 personalities require bio splitting,
* RAID0/4/5/6 don't and process large discard bios properly.
*/
if (rs_is_raid1(rs) || rs_is_raid10(rs)) {
limits->discard_granularity = chunk_size;
limits->max_discard_sectors = chunk_size;
}
}
static void raid_postsuspend(struct dm_target *ti)