linux-kernel - Re: [PATCH -next 0/3] md/raid10: reduce lock contention for io

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Sat, 3 Sep 2022 14:08:21 +0800
From:   Yu Kuai <yukuai1@...weicloud.com>
To:     Song Liu <song@...nel.org>, Yu Kuai <yukuai1@...weicloud.com>
Cc:     linux-raid <linux-raid@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>, yi.zhang@...wei.com,
        "yukuai (C)" <yukuai3@...wei.com>
Subject: Re: [PATCH -next 0/3] md/raid10: reduce lock contention for io

Hi, Song

在 2022/09/01 2:00, Song Liu 写道:
> On Mon, Aug 29, 2022 at 6:03 AM Yu Kuai <yukuai1@...weicloud.com> wrote:
>>
>> From: Yu Kuai <yukuai3@...wei.com>
>>
>> patch 1 is a small problem found by code review.
>> patch 2 avoid holding resync_lock in fast path.
>> patch 3 avoid holding lock in wake_up() in fast path.
>>
>> Test environment:
>>
>> Architecture: aarch64
>> Cpu: Huawei KUNPENG 920, there are four numa nodes
>>
>> Raid10 initialize:
>> mdadm --create /dev/md0 --level 10 --bitmap none --raid-devices 4 /dev/nvme0n1 /dev/nvme1n1 /dev/nvme2n1 /dev/nvme3n1
>>
>> Test cmd:
>> fio -name=0 -ioengine=libaio -direct=1 -group_reporting=1 -randseed=2022 -rwmixread=70 -refill_buffers -filename=/dev/md0 -numjobs=16 -runtime=60s -bs=4k -iodepth=256 -rw=randread
>>
>> Test result:
>> before this patchset:   2.9 GiB/s
>> after this patchset:    6.6 Gib/s
> 
> Nice work! Applied to md-next.

Can you drop this version? There are something to improve. I can send a
new version.

Thanks,
Kuai
> 
> Thanks,
> Song
> .
>