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f2fs: don't wake up too frequently, if there is lots of IOs 

Otherwise, it wakes up discard thread which will sleep again by busy IOs
in a loop.

Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
hifive-unleashed-5.1
Jaegeuk Kim 2019-01-25 10:26:39 -08:00
parent b86232536c
commit b460866d27
1 changed files with 1 additions and 1 deletions
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2
fs/f2fs/segment.h
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@ -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;