From: Sasha Levin <sashal@kernel.org>
To: stable@vger.kernel.org
Cc: Sasha Levin <sashal@kernel.org>,
Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
Thomas Gleixner <tglx@kernel.org>,
Jiayuan Chen <jiayuan.chen@linux.dev>,
linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Jonas Jelonek <jelonek.jonas@gmail.com>
Subject: Re: [PATCH 6.1.y] MIPS: smp: report dying CPU to RCU in stop_this_cpu()
Date: Sat, 11 Jul 2026 06:20:57 -0400 [thread overview]
Message-ID: <20260711061631.agent5-0003@kernel.org> (raw)
In-Reply-To: <20260710225147.24574-1-jelonek.jonas@gmail.com>
> commit 9f3f3bdc6d9dac1a5a8262ee7ad0f2ff1527a7e7 upstream.
>
> smp_send_stop() parks all secondary CPUs in stop_this_cpu(). The function
> marks the CPU offline for the scheduler via set_cpu_online(false) but
> never informs RCU, so RCU keeps expecting a quiescent state from CPUs
> that are now spinning forever with interrupts disabled.
Queued for 6.1, thanks.
--
Thanks,
Sasha
prev parent reply other threads:[~2026-07-11 10:21 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-10 22:51 [PATCH 6.1.y] MIPS: smp: report dying CPU to RCU in stop_this_cpu() Jonas Jelonek
2026-07-11 10:20 ` Sasha Levin [this message]
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