linux-kernel - Re: [PATCH v2] erofs: fix bio->bi_max

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Date:   Mon, 8 Mar 2021 09:29:30 +0800
From:   Chao Yu <yuchao0@...wei.com>
To:     Gao Xiang <hsiangkao@....com>, <linux-erofs@...ts.ozlabs.org>,
        Chao Yu <chao@...nel.org>
CC:     <linux-kernel@...r.kernel.org>, Gao Xiang <hsiangkao@...hat.com>,
        "Martin DEVERA" <devik@...labs.cz>
Subject: Re: [PATCH v2] erofs: fix bio->bi_max_vecs behavior change

On 2021/3/6 12:04, Gao Xiang wrote:
> From: Gao Xiang <hsiangkao@...hat.com>
> 
> Martin reported an issue that directory read could be hung on the
> latest -rc kernel with some certain image. The root cause is that
> commit baa2c7c97153 ("block: set .bi_max_vecs as actual allocated
> vector number") changes .bi_max_vecs behavior. bio->bi_max_vecs
> is set as actual allocated vector number rather than the requested
> number now.
> 
> Let's avoid using .bi_max_vecs completely instead.
> 
> Reported-by: Martin DEVERA <devik@...labs.cz>
> Signed-off-by: Gao Xiang <hsiangkao@...hat.com>

Looks good to me, btw, it needs to Cc stable mailing list?

Reviewed-by: Chao Yu <yuchao0@...wei.com>

Thanks,