linux-kernel - Re: [PATCH] fs-writeback: Flush plug before next iteration in wb

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Message-ID: <20220416054214.GA7386@lst.de>
Date:   Sat, 16 Apr 2022 07:42:14 +0200
From:   Christoph Hellwig <hch@....de>
To:     Zhihao Cheng <chengzhihao1@...wei.com>
Cc:     Christoph Hellwig <hch@....de>, viro@...iv.linux.org.uk,
        torvalds@...ux-foundation.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, yukuai3@...wei.com
Subject: Re: [PATCH] fs-writeback: Flush plug before next iteration in
 wb_writeback()

> 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.