Re: [PATCH] fs-writeback: Flush plug before next iteration in wb_writeback()

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To: Zhihao Cheng <chengzhihao1@xxxxxxxxxx>
Subject: Re: [PATCH] fs-writeback: Flush plug before next iteration in wb_writeback()
From: Christoph Hellwig <hch@xxxxxx>
Date: Sat, 16 Apr 2022 07:42:14 +0200
Cc: Christoph Hellwig <hch@xxxxxx>, viro@xxxxxxxxxxxxxxxxxx, torvalds@xxxxxxxxxxxxxxxxxxxx, linux-fsdevel@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, yukuai3@xxxxxxxxxx
In-reply-to: <cf500f73-6c89-0d48-c658-4185fbf54b2c@huawei.com>
User-agent: Mutt/1.5.17 (2007-11-01)

> I think the root cause is fsync gets buffer head's lock without locking 
> corresponding page, fixing 'progess' and flushing plug are both 
> workarounds.

So let's fix that.

Follow-Ups:
- Re: [PATCH] fs-writeback: Flush plug before next iteration in wb_writeback()
  - From: Zhihao Cheng

References:
- [PATCH] fs-writeback: Flush plug before next iteration in wb_writeback()
  - From: Zhihao Cheng
- Re: [PATCH] fs-writeback: Flush plug before next iteration in wb_writeback()
  - From: Christoph Hellwig
- Re: [PATCH] fs-writeback: Flush plug before next iteration in wb_writeback()
  - From: Zhihao Cheng

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