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From: Tejun Heo <tj@kernel.org>
To: Yao Kai <yaokai34@huawei.com>
Cc: Lai Jiangshan <jiangshanlai@gmail.com>,
	Breno Leitao <leitao@debian.org>,
	linux-kernel@vger.kernel.org,
	liuyongqiang <liuyongqiang13@huawei.com>
Subject: Re: [QUESTION] workqueue: Reducing flush_workqueue() overhead for unbound workqueues
Date: Tue, 01 Sep 2026 11:11:58 -1000	[thread overview]
Message-ID: <92e520050991ea409925012255480655@kernel.org> (raw)
In-Reply-To: <0a030145-c108-4365-ba2d-ac1973a1e352@huawei.com>

Hello,

On Tue, Sep 01, 2026 at 04:46:06PM +0800, Yao Kai wrote:
> Is there a recommended way to avoid this overhead for such case,
> I would appreciate guidance on how this problem should be solved.

Posted a patchset which makes flush_workqueue() visit only the pwqs which
have been active since the last flush:

  https://lore.kernel.org/all/20260901210929.3092513-1-tj@kernel.org/

Can you please test whether it resolves the fsync latency issue you're
seeing?

Thanks.

--
tejun

  reply	other threads:[~2026-09-01 21:12 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-09-01  8:46 [QUESTION] workqueue: Reducing flush_workqueue() overhead for unbound workqueues Yao Kai
2026-09-01 21:11 ` Tejun Heo [this message]
2026-09-07  2:19   ` Yao Kai
2026-09-08 17:35     ` Tejun Heo

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