linux-kernel - Re: [lkp-robot] [scsi] 5c279bd9e4: blogbench.read

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Message-ID: <CACVXFVOJcJY3wYbm6LgqSDm021O+Uk-yNm9zcoLeYR+=Rn_bzg@mail.gmail.com>
Date:   Thu, 6 Jul 2017 15:12:31 +0800
From:   Ming Lei <tom.leiming@...il.com>
To:     Ye Xiaolong <xiaolong.ye@...el.com>
Cc:     Christoph Hellwig <hch@....de>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        LKML <linux-kernel@...r.kernel.org>,
        "James E.J. Bottomley" <James.Bottomley@...senpartnership.com>,
        Linux SCSI List <linux-scsi@...r.kernel.org>,
        LKP ML <lkp@...org>
Subject: Re: [lkp-robot] [scsi] 5c279bd9e4: blogbench.read_score -10.0% regression

On Thu, Jul 6, 2017 at 10:54 AM, Ye Xiaolong <xiaolong.ye@...el.com> wrote:
> Hi, Ming Lei
>
> On 07/06, Ming Lei wrote:
>>Hi Xiaolong,
>>
>>On Mon, Jul 3, 2017 at 10:57 AM, kernel test robot
>><xiaolong.ye@...el.com> wrote:
>>>
>>> Greeting,
>>>
>>> FYI, we noticed a -10.0% regression of blogbench.read_score due to commit:
>>
>>Looks like related with mq scheduler, could you test the following patch to see
>>if your issue can be fixed?
>>
>>https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git/commit/?h=for-linus&id=32825c45ff8f4cce937ab85b030dc693ceb1aa0a
>>
>
> Here is the comparison of commit 5c279bd9e4 and 32825c45, it does help recover
> performance back.

That is great, thanks for your test!

This patch has been in block tree, and will be pushed to v4.13.

Thanks,
Ming