On Sat, Apr 16, 2022 at 04:41:35PM +0800, Zhihao Cheng wrote: > So, how about applying the safe and simple method(flush plug) for the time > being? As said before - if you flush everytime here the plug is basically useless and we could remove it. But it was added for a reason. So let's at least improve the accounting for the skipped writeback as suggested in your last mail.