From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jens Axboe Subject: Re: [PATCH] MD: make bio mergeable Date: Mon, 25 Apr 2016 19:15:58 -0600 Message-ID: <571EC14E.6040703@kernel.dk> References: <384a0e0c7d6f2700aadbcbdef003cece88fa7dd7.1461626533.git.shli@fb.com> <571EBD56.7010204@kernel.dk> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <571EBD56.7010204@kernel.dk> Sender: stable-owner@vger.kernel.org To: Shaohua Li , linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org Cc: qkrwngud825@gmail.com, Kernel-team@fb.com, "v4.3+" , Ming Lei , Jens Axboe , Neil Brown List-Id: linux-raid.ids On 04/25/2016 06:59 PM, Jens Axboe wrote: > On 04/25/2016 05:52 PM, Shaohua Li wrote: >> blk_queue_split marks bio unmergeable, which makes sense for normal bio. >> But if dispatching the bio to underlayer disk, the blk_queue_split >> checks are invalid, hence it's possible the bio becomes mergeable. >> >> In the reported bug, this bug causes trim against raid0 performance slash >> https://bugzilla.kernel.org/show_bug.cgi?id=117051 > > Good catch! Will apply for this series, thanks Shaohua. Actually, let's let that go through the md tree instead. But you can add my Reviewed-by, and it'd be nice to get this into 4.6. -- Jens Axboe