The commit is pushed to "branch-rh7-3.10.0-123.1.2-ovz" and will appear at
https://src.openvz.org/scm/ovz/vzkernel.git
after rh7-3.10.0-123.1.2.vz7.5.1
------>
commit f4520fa1bcbd2fc979b5dcae101cfe9ea0b4217a
Author: Andrey Smetanin <asmeta...@virtuozzo.com>
Date: Tue May 19 08:26:59 2015 +0400
ploop: fix sync delay for sync requests
In case of sync requests coming through allocate-new-block path, it is
incorrect to delay wakeup of fsync-thread. Sync request should always
be processed as soon as possible.
https://jira.sw.ru/browse/PSBM-22381
Signed-off-by: Maxim Patlasov <mpatla...@parallels.com>
---
drivers/block/ploop/io_direct.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/block/ploop/io_direct.c b/drivers/block/ploop/io_direct.c
index 56b9f37..babc940 100644
--- a/drivers/block/ploop/io_direct.c
+++ b/drivers/block/ploop/io_direct.c
@@ -448,7 +448,8 @@ try_again:
preq->iblock = iblk;
list_add_tail(&preq->list, &io->fsync_queue);
plo->st.bio_syncwait++;
- if (++io->fsync_qlen >= plo->tune.fsync_max &&
+ if ((test_bit(PLOOP_REQ_SYNC, &preq->state) ||
+ ++io->fsync_qlen >= plo->tune.fsync_max) &&
waitqueue_active(&io->fsync_waitq))
wake_up_interruptible(&io->fsync_waitq);
else if (!timer_pending(&io->fsync_timer))
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