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| author |   Mikulas Patocka <mpatocka@redhat.com> | 2021-06-15 14:17:35 -0400 |
|---|---|---|
| committer |   Mike Snitzer <snitzer@redhat.com> | 2021-06-15 15:42:03 -0400 |
| commit | 293128b1ef5ae2cfa7403d54e183fe689ed5d303 (patch) | |
| tree | dd349a4d33751ae24bf01896197e05a72ec2ea49 /drivers/md/dm-kcopyd.c | |
| parent | dm writecache: use list_move instead of list_del/list_add in writecache_writeback() (diff) | |
| download | linux-dev-293128b1ef5ae2cfa7403d54e183fe689ed5d303.tar.xz linux-dev-293128b1ef5ae2cfa7403d54e183fe689ed5d303.zip | |
dm writecache: have ssd writeback wait if the kcopyd workqueue is busy
Make dm-writecache wait if the kcopyd workqueue is busy (as will
happen if waiting for page allocation or inside submit_bio).
This change improves performance of "mkfs.ext2" by approximately 20%
on one testbed.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/dm-kcopyd.c')
| -rw-r--r-- | drivers/md/dm-kcopyd.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/md/dm-kcopyd.c b/drivers/md/dm-kcopyd.c index e50625ce74ec..37b03ab7e5c9 100644 --- a/drivers/md/dm-kcopyd.c +++ b/drivers/md/dm-kcopyd.c @@ -980,3 +980,9 @@ void dm_kcopyd_client_destroy(struct dm_kcopyd_client *kc) kfree(kc); } EXPORT_SYMBOL(dm_kcopyd_client_destroy); + +void dm_kcopyd_client_flush(struct dm_kcopyd_client *kc) +{ + flush_workqueue(kc->kcopyd_wq); +} +EXPORT_SYMBOL(dm_kcopyd_client_flush); |