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Code Activity

dm crypt: remove BIOSET_NEED_RESCUER flag

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The BIOSET_NEED_RESCUER flag is only needed when a make_request_fn might
do two allocations from the one bioset, and the second one could block
until the first bio completes.

dm-crypt does allocate from this bioset inside the dm make_request_fn,
but does so using GFP_NOWAIT so that the allocation will not block.

So BIOSET_NEED_RESCUER is not needed.

Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
NeilBrown 2017-08-30 08:10:18 +10:00 • committed by Mike Snitzer
parent c06b3e5837
commit 80cd175783
1 changed files with 1 additions and 2 deletions
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3
drivers/md/dm-crypt.c
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@ -2697,8 +2697,7 @@ static int crypt_ctr(struct dm_target *ti, unsigned int argc, char **argv)
goto bad;
}
cc->bs = bioset_create(MIN_IOS, 0, (BIOSET_NEED_BVECS |
BIOSET_NEED_RESCUER));
cc->bs = bioset_create(MIN_IOS, 0, BIOSET_NEED_BVECS);
if (!cc->bs) {
ti->error = "Cannot allocate crypt bioset";
goto bad;