linux-kernel - Re: [PATCH] block: move sanity checking ahead of bi_front/back_seg

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Message-ID: <20170919143644.GA15944@infradead.org>
Date:   Tue, 19 Sep 2017 07:36:44 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     "jianchao.wang" <jianchao.w.wang@...cle.com>
Cc:     Christoph Hellwig <hch@...radead.org>,
        Jens Axboe <axboe@...nel.dk>, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] block: move sanity checking ahead of
 bi_front/back_seg_size updating

On Tue, Sep 19, 2017 at 08:55:59AM +0800, jianchao.wang wrote:
> > But can you elaborate a little more on how this found and if there
> > is a way to easily reproduce it, say for a blktests test case?
> > 
> It is found when I made the patch of 
> 'block: consider merge of segments when merge bio into rq' , not from an actual
> issue or test case.

Same question applies to that one, I just haven't finished understanding
all the changes in it yet.