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| author | Josef Bacik <jbacik@fb.com> | 2017-07-28 10:42:24 -0400 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2017-09-11 09:50:46 -0400 |
| commit | 0c79c62021d23f0b5c942cf59d43a7ce6c24cd1b (patch) | |
| tree | 8b8459eecabd432bdf38dce5dd3dc875211ca7ec | |
| parent | cf0dec6674c1e2a7ba326cfbbe7f05a70458afc9 (diff) | |
| download | linux-stable-0c79c62021d23f0b5c942cf59d43a7ce6c24cd1b.tar.gz linux-stable-0c79c62021d23f0b5c942cf59d43a7ce6c24cd1b.tar.bz2 linux-stable-0c79c62021d23f0b5c942cf59d43a7ce6c24cd1b.zip | |
dm log writes: don't use all the cpu while waiting to log blocks
The check to see if the logging kthread needs to go to sleep is wrong,
it checks lc->pending_blocks, which will be non-0 if there are any
blocks that are pending, whether they are ready to be logged or not.
What we really want is to go to sleep until it's time to log blocks, so
change this check so we do actually go to sleep in between flushes.
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
| -rw-r--r-- | drivers/md/dm-log-writes.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/md/dm-log-writes.c b/drivers/md/dm-log-writes.c index a1da0eb58a93..9aab510a1709 100644 --- a/drivers/md/dm-log-writes.c +++ b/drivers/md/dm-log-writes.c @@ -399,7 +399,7 @@ next: if (!try_to_freeze()) { set_current_state(TASK_INTERRUPTIBLE); if (!kthread_should_stop() && - !atomic_read(&lc->pending_blocks)) + list_empty(&lc->logging_blocks)) schedule(); __set_current_state(TASK_RUNNING); } |