linux-kernel - Re: [PATCH 0/3 v3] genirq: Fix IRQ threads VS cpuset

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Message-ID: <8e5ff133-9af9-4718-9e94-ca2102e26ff6@samsung.com>
Date: Fri, 21 Nov 2025 21:05:07 +0100
From: Marek Szyprowski <m.szyprowski@...sung.com>
To: Frederic Weisbecker <frederic@...nel.org>, Thomas Gleixner
	<tglx@...utronix.de>
Cc: LKML <linux-kernel@...r.kernel.org>, Marco Crivellari
	<marco.crivellari@...e.com>, Waiman Long <llong@...hat.com>,
	cgroups@...r.kernel.org
Subject: Re: [PATCH 0/3 v3] genirq: Fix IRQ threads VS cpuset

On 21.11.2025 15:34, Frederic Weisbecker wrote:
> Here is another take after some last minutes issues reported by
> Marek Szyprowski <m.szyprowski@...sung.com>:
>
> https://lore.kernel.org/all/73356b5f-ab5c-4e9e-b57f-b80981c35998@samsung.com/

Works fine on my test systems.

Tested-by: Marek Szyprowski <m.szyprowski@...sung.com>

> Changes since v2:
>
> * Fix early spurious IRQ thread wake-up (to be SOB'ed by Thomas)
>
> * Instead of applying the affinity remotely, set PF_NO_SETAFFINITY
>    early, right after kthread creation, and wait for the thread to
>    apply the affinity by itself. This is to prevent from early wake-up
>    to mess up with kthread_bind_mask(), as reported by
>    Marek Szyprowski <m.szyprowski@...sung.com>
>
> Frederic Weisbecker (2):
>    genirq: Fix interrupt threads affinity vs. cpuset isolated partitions
>    genirq: Remove cpumask availability check on kthread affinity setting
>
> Thomas Gleixner (1):
>    genirq: Prevent from early irq thread spurious wake-ups
>
>   kernel/irq/handle.c | 10 +++++++++-
>   kernel/irq/manage.c | 40 +++++++++++++++++++---------------------
>   2 files changed, 28 insertions(+), 22 deletions(-)
>
Best regards
-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland