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Message-ID: <a7246f63-b499-8b26-e27a-3d16abc18ced@huaweicloud.com>
Date: Fri, 12 May 2023 17:42:59 +0800
From: Yu Kuai <yukuai1@...weicloud.com>
To: Yu Kuai <yukuai1@...weicloud.com>, song@...nel.org, akpm@...l.org,
neilb@...e.de
Cc: linux-raid@...r.kernel.org, linux-kernel@...r.kernel.org,
yi.zhang@...wei.com, yangerkun@...wei.com,
"yukuai (C)" <yukuai3@...wei.com>
Subject: Re: [PATCH -next v2 0/7] limit the number of plugged bio
Hi,
在 2023/04/26 16:20, Yu Kuai 写道:
> From: Yu Kuai <yukuai3@...wei.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(-)
>
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