linux-kernel - Re: Query about timer wheel API

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Message-ID: <20241223125202.407-1-hdanton@sina.com>
Date: Mon, 23 Dec 2024 20:51:34 +0800
From: Hillf Danton <hdanton@...a.com>
To: imran.f.khan@...cle.com
Cc: Thomas Gleixner <tglx@...utronix.de>,
	Tejun Heo <tj@...nel.org>,
	john.stultz@...aro.org,
	sboyd@...nel.org,
	linux-kernel@...r.kernel.org
Subject: Re: Query about timer wheel API

On Mon, 23 Dec 2024 11:14:21 +1100 imran.f.khan@...cle.com
> 
> Recently we have come across some bugs in the RDS code, where a delayed
> work was being queued on an offlined CPU and as a result of that the

Such a queue could not happen given irq disabled in queue_delayed_work_on().
Did you see it upstream?

> underlying timer was not firing, which in turn meant that the work was
> never able to make it to the intended worker_pool.