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Subject: Re: [PATCH -next v2 0/7] limit the number of plugged bio
To:     Yu Kuai <yukuai1@huaweicloud.com>, song@kernel.org, akpm@osdl.org,
        neilb@suse.de
Cc:     linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org,
        yi.zhang@huawei.com, yangerkun@huawei.com,
        "yukuai (C)" <yukuai3@huawei.com>
References: <20230426082031.1299149-1-yukuai1@huaweicloud.com>
From:   Yu Kuai <yukuai1@huaweicloud.com>
Message-ID: <a7246f63-b499-8b26-e27a-3d16abc18ced@huaweicloud.com>
Date:   Fri, 12 May 2023 17:42:59 +0800
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Hi,

?? 2023/04/26 16:20, Yu Kuai д??:
> From: Yu Kuai <yukuai3@huawei.com>
> 
> Changes in v2:
>   - remove the patch to rename raid1-10.c
> 
> This patchset tries to limit the number of plugged bio for raid1 and
> raid10, which is done in the last patch, other patches are some refactor
> and optimizations.
> 
> This patchset is tested with a new test [1], this test triggers dirty
> pages writeback for 10s, and in the meantime checks disk inflight.
> 
> Before this patchset, test will fail because inflight exceed threshold
> (threshold is set to 4096 in the test, in theory this can be mutch
>   greater as long as there are enough dirty pages and memory).
> 
> After this patchset, inflight is within 96 (MAX_PLUG_BIO * copies).
> 
> [1] https://lore.kernel.org/linux-raid/20230426073447.1294916-1-yukuai1@huaweicloud.com/

Friendly ping...

Thanks,
Kuai
> 
> Yu Kuai (7):
>    md/raid10: prevent soft lockup while flush writes
>    md/raid1-10: factor out a helper to add bio to plug
>    md/raid1-10: factor out a helper to submit normal write
>    md/raid1-10: submit write io directly if bitmap is not enabled
>    md/md-bitmap: add a new helper to unplug bitmap asynchrously
>    md/raid1-10: don't handle pluged bio by daemon thread
>    md/raid1-10: limit the number of plugged bio
> 
>   drivers/md/md-bitmap.c | 55 +++++++++++++++++++++++++++++++++----
>   drivers/md/md-bitmap.h | 10 +++++++
>   drivers/md/raid1-10.c  | 62 ++++++++++++++++++++++++++++++++++++++++++
>   drivers/md/raid1.c     | 29 ++++----------------
>   drivers/md/raid10.c    | 47 +++++++-------------------------
>   5 files changed, 136 insertions(+), 67 deletions(-)
>