linux-kernel - Re: [PATCH cgroup/for-6.19] cgroup: Fix sleeping from invalid context warning on PREEMPT

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Message-ID: <20251106174614.2yy65_wM@linutronix.de>
Date: Thu, 6 Nov 2025 18:46:14 +0100
From: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To: Tejun Heo <tj@...nel.org>
Cc: Calvin Owens <calvin@...nvd.org>, linux-kernel@...r.kernel.org,
	Dan Schatzberg <dschatzberg@...a.com>,
	Peter Zijlstra <peterz@...radead.org>
Subject: Re: [PATCH cgroup/for-6.19] cgroup: Fix sleeping from invalid
 context warning on PREEMPT_RT

On 2025-11-06 07:37:16 [-1000], Tejun Heo wrote:
> Hello,
Hi,

> On Thu, Nov 06, 2025 at 04:07:17PM +0100, Sebastian Andrzej Siewior wrote:
> > How important is it, that it happens right away? Written as-is, this
> 
> Not important at all.
> 
…
> Will switch to IRQ_WORK_LAZY_INIT.

Quick question: Since it is not important at all, would it work to have
it in task's RCU callback, __put_task_struct()?

> Thanks for the review.
> 

Sebastian