From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751828AbdISOgt (ORCPT ); Tue, 19 Sep 2017 10:36:49 -0400 Received: from bombadil.infradead.org ([65.50.211.133]:42012 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751309AbdISOgr (ORCPT ); Tue, 19 Sep 2017 10:36:47 -0400 Date: Tue, 19 Sep 2017 07:36:44 -0700 From: Christoph Hellwig To: "jianchao.wang" Cc: Christoph Hellwig , Jens Axboe , linux-block@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] block: move sanity checking ahead of bi_front/back_seg_size updating Message-ID: <20170919143644.GA15944@infradead.org> References: <1505517030-29287-1-git-send-email-jianchao.w.wang@oracle.com> <20170918235110.GB8600@infradead.org> <043c8787-1056-c16d-a38d-a421920742de@oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <043c8787-1056-c16d-a38d-a421920742de@oracle.com> User-Agent: Mutt/1.8.3 (2017-05-23) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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.