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Re: [PATCH] MD: make bio mergeable

From Jens Axboe <axboe@kernel.dk>
Newsgroups linux.kernel
Subject Re: [PATCH] MD: make bio mergeable
Date 2016-04-26 03:20 +0200
Message-ID <rrZPs-7hQ-9@gated-at.bofh.it> (permalink)
References <rrYA2-67A-5@gated-at.bofh.it> <rrZw6-6PQ-21@gated-at.bofh.it>
Organization linux.* mail to news gateway

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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

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Thread

[PATCH] MD: make bio mergeable Shaohua Li <shli@fb.com> - 2016-04-26 02:00 +0200
  Re: [PATCH] MD: make bio mergeable Jens Axboe <axboe@kernel.dk> - 2016-04-26 03:00 +0200
    Re: [PATCH] MD: make bio mergeable Jens Axboe <axboe@kernel.dk> - 2016-04-26 03:20 +0200
  Re: [PATCH] MD: make bio mergeable Ming Lei <ming.lei@canonical.com> - 2016-04-26 12:00 +0200
    Re: [PATCH] MD: make bio mergeable Jens Axboe <axboe@kernel.dk> - 2016-04-26 16:30 +0200
      Re: [PATCH] MD: make bio mergeable Ming Lei <ming.lei@canonical.com> - 2016-04-26 17:20 +0200

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