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dm: add support for REQ_NOWAIT to various targets 

commit 021a24460d ("block: add QUEUE_FLAG_NOWAIT") added a new queue
flag QUEUE_FLAG_NOWAIT to advertise if the bdev supports handling of
REQ_NOWAIT or not. DM core supports stacking QUEUE_FLAG_NOWAIT since
commit 6abc49468e ("dm: add support for REQ_NOWAIT and enable it for
linear target"), in which only dm-linear enabled it.

Update others DM targets, which just do simple remapping, to enable
support for REQ_NOWAIT.

Signed-off-by: Jeffle Xu <jefflexu@linux.alibaba.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
zero-sugar-mainline-defconfig
Jeffle Xu 2020-11-13 10:05:51 +08:00 committed by Mike Snitzer
parent 298fb37298
commit 410fe22007
4 changed files with 4 additions and 1 deletions
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2
drivers/md/dm-stripe.c
View File

@ -496,7 +496,7 @@ static void stripe_io_hints(struct dm_target *ti,
static struct target_type stripe_target = {
.name = "striped",
.version = {1, 6, 0},
.features = DM_TARGET_PASSES_INTEGRITY,
.features = DM_TARGET_PASSES_INTEGRITY | DM_TARGET_NOWAIT,
.module = THIS_MODULE,
.ctr = stripe_ctr,
.dtr = stripe_dtr,

1
drivers/md/dm-switch.c
View File

@ -550,6 +550,7 @@ static int switch_iterate_devices(struct dm_target *ti,
static struct target_type switch_target = {
.name = "switch",
.version = {1, 1, 0},
.features = DM_TARGET_NOWAIT,
.module = THIS_MODULE,
.ctr = switch_ctr,
.dtr = switch_dtr,

1
drivers/md/dm-unstripe.c
View File

@ -178,6 +178,7 @@ static void unstripe_io_hints(struct dm_target *ti,
static struct target_type unstripe_target = {
.name = "unstriped",
.version = {1, 1, 0},
.features = DM_TARGET_NOWAIT,
.module = THIS_MODULE,
.ctr = unstripe_ctr,
.dtr = unstripe_dtr,

1
drivers/md/dm-zero.c
View File

@ -59,6 +59,7 @@ static int zero_map(struct dm_target *ti, struct bio *bio)
static struct target_type zero_target = {
.name = "zero",
.version = {1, 1, 0},
.features = DM_TARGET_NOWAIT,
.module = THIS_MODULE,
.ctr = zero_ctr,
.map = zero_map,