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From: Yongji Xie <xieyongji@bytedance.com>
To: Christoph Hellwig <hch@infradead.org>
Cc: Josef Bacik <josef@toxicpanda.com>, Jens Axboe <axboe@kernel.dk>,
	linux-block@vger.kernel.org, nbd@other.debian.org,
	yixingchen@bytedance.com
Subject: Re: [PATCH] nbd: clear wb_err in bd_inode on disconnect
Date: Thu, 9 Sep 2021 20:34:12 +0800	[thread overview]
Message-ID: <CACycT3vHrN3tgeH91gdzr08DXd8KCXyAuxUb5k-HcwB7coi4iA@mail.gmail.com> (raw)
In-Reply-To: <YTmqJHd7YWAQ2lZ7@infradead.org>

On Thu, Sep 9, 2021 at 2:31 PM Christoph Hellwig <hch@infradead.org> wrote:
>
> On Tue, Sep 07, 2021 at 08:14:25PM +0800, Xie Yongji wrote:
> > When a nbd device encounters a writeback error, that error will
> > get propagated to the bd_inode's wb_err field. Then if this nbd
> > device's backend is disconnected and another is attached, we will
> > get back the previous writeback error on fsync, which is unexpected.
> > To fix it, let's clear out the wb_err on disconnect.
>
> I really do not like how internals of the implementation like into
> drivers here.  Can you add a block layer helper to clear any state
> instead? This should incude e.g. the size just cleared above and should
> also be used by the loop driver as well.

Sure, will do it.

Thanks,
Yongji

      reply	other threads:[~2021-09-09 14:15 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-07 12:14 [PATCH] nbd: clear wb_err in bd_inode on disconnect Xie Yongji
2021-09-09  6:31 ` Christoph Hellwig
2021-09-09 12:34   ` Yongji Xie [this message]

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