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Subject[PATCH 4/7] f2fs: don't wake up too frequently, if there is lots of IOs
Date
Otherwise, it wakes up discard thread which will sleep again by busy IOs
in a loop.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---
fs/f2fs/segment.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h
index a77f76f528b6..5c7ed0442d6e 100644
--- a/fs/f2fs/segment.h
+++ b/fs/f2fs/segment.h
@@ -865,7 +865,7 @@ static inline void wake_up_discard_thread(struct f2fs_sb_info *sbi, bool force)
}
}
mutex_unlock(&dcc->cmd_lock);
- if (!wakeup)
+ if (!wakeup || !is_idle(sbi, DISCARD_TIME))
return;
wake_up:
dcc->discard_wake = 1;
--
2.19.0.605.g01d371f741-goog
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