From: Peter Zijlstra <peterz@infradead.org>
To: Jing-Ting Wu <jing-ting.wu@mediatek.com>
Cc: Daniel Bristot de Oliveira <bristot@redhat.com>,
Valentin Schneider <vschneid@redhat.com>,
tglx@linutronix.de, wsd_upstream@mediatek.com,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org, Jonathan.JMChen@mediatek.com,
"chris.redpath@arm.com" <chris.redpath@arm.com>,
Dietmar Eggemann <dietmar.eggemann@arm.com>,
Vincent Donnefort <vdonnefort@gmail.com>,
Ingo Molnar <mingo@redhat.com>,
Juri Lelli <juri.lelli@redhat.com>,
Vincent Guittot <vincent.guittot@linaro.org>,
Steven Rostedt <rostedt@goodmis.org>,
Ben Segall <bsegall@google.com>, Mel Gorman <mgorman@suse.de>,
Christian Brauner <brauner@kernel.org>
Subject: Re: [Bug] Race condition between CPU hotplug off flow and __sched_setscheduler()
Date: Thu, 19 May 2022 15:19:26 +0200 [thread overview]
Message-ID: <20220519131926.GB6479@worktop.programming.kicks-ass.net> (raw)
In-Reply-To: <20220519131452.GG2578@worktop.programming.kicks-ass.net>
On Thu, May 19, 2022 at 03:14:52PM +0200, Peter Zijlstra wrote:
> On Thu, May 19, 2022 at 08:53:15PM +0800, Jing-Ting Wu wrote:
> > Hi all
> >
> >
> > There is a race condition between CPU hotplug off flow and
> > __sched_setscheduler(), which will cause hang-up in CPU hotplug off
> > flow.
>
> Oooh, you're using core scheduling and the A/B are SMT siblings?
Hmm, no.. lemme try again.
WARNING: multiple messages have this Message-ID (diff)
From: Peter Zijlstra <peterz@infradead.org>
To: Jing-Ting Wu <jing-ting.wu@mediatek.com>
Cc: Daniel Bristot de Oliveira <bristot@redhat.com>,
Valentin Schneider <vschneid@redhat.com>,
tglx@linutronix.de, wsd_upstream@mediatek.com,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org, Jonathan.JMChen@mediatek.com,
"chris.redpath@arm.com" <chris.redpath@arm.com>,
Dietmar Eggemann <dietmar.eggemann@arm.com>,
Vincent Donnefort <vdonnefort@gmail.com>,
Ingo Molnar <mingo@redhat.com>,
Juri Lelli <juri.lelli@redhat.com>,
Vincent Guittot <vincent.guittot@linaro.org>,
Steven Rostedt <rostedt@goodmis.org>,
Ben Segall <bsegall@google.com>, Mel Gorman <mgorman@suse.de>,
Christian Brauner <brauner@kernel.org>
Subject: Re: [Bug] Race condition between CPU hotplug off flow and __sched_setscheduler()
Date: Thu, 19 May 2022 15:19:26 +0200 [thread overview]
Message-ID: <20220519131926.GB6479@worktop.programming.kicks-ass.net> (raw)
In-Reply-To: <20220519131452.GG2578@worktop.programming.kicks-ass.net>
On Thu, May 19, 2022 at 03:14:52PM +0200, Peter Zijlstra wrote:
> On Thu, May 19, 2022 at 08:53:15PM +0800, Jing-Ting Wu wrote:
> > Hi all
> >
> >
> > There is a race condition between CPU hotplug off flow and
> > __sched_setscheduler(), which will cause hang-up in CPU hotplug off
> > flow.
>
> Oooh, you're using core scheduling and the A/B are SMT siblings?
Hmm, no.. lemme try again.
_______________________________________________
Linux-mediatek mailing list
Linux-mediatek@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-mediatek
WARNING: multiple messages have this Message-ID (diff)
From: Peter Zijlstra <peterz@infradead.org>
To: Jing-Ting Wu <jing-ting.wu@mediatek.com>
Cc: Daniel Bristot de Oliveira <bristot@redhat.com>,
Valentin Schneider <vschneid@redhat.com>,
tglx@linutronix.de, wsd_upstream@mediatek.com,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org, Jonathan.JMChen@mediatek.com,
"chris.redpath@arm.com" <chris.redpath@arm.com>,
Dietmar Eggemann <dietmar.eggemann@arm.com>,
Vincent Donnefort <vdonnefort@gmail.com>,
Ingo Molnar <mingo@redhat.com>,
Juri Lelli <juri.lelli@redhat.com>,
Vincent Guittot <vincent.guittot@linaro.org>,
Steven Rostedt <rostedt@goodmis.org>,
Ben Segall <bsegall@google.com>, Mel Gorman <mgorman@suse.de>,
Christian Brauner <brauner@kernel.org>
Subject: Re: [Bug] Race condition between CPU hotplug off flow and __sched_setscheduler()
Date: Thu, 19 May 2022 15:19:26 +0200 [thread overview]
Message-ID: <20220519131926.GB6479@worktop.programming.kicks-ass.net> (raw)
In-Reply-To: <20220519131452.GG2578@worktop.programming.kicks-ass.net>
On Thu, May 19, 2022 at 03:14:52PM +0200, Peter Zijlstra wrote:
> On Thu, May 19, 2022 at 08:53:15PM +0800, Jing-Ting Wu wrote:
> > Hi all
> >
> >
> > There is a race condition between CPU hotplug off flow and
> > __sched_setscheduler(), which will cause hang-up in CPU hotplug off
> > flow.
>
> Oooh, you're using core scheduling and the A/B are SMT siblings?
Hmm, no.. lemme try again.
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2022-05-19 13:19 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-19 12:53 [Bug] Race condition between CPU hotplug off flow and __sched_setscheduler() Jing-Ting Wu
2022-05-19 12:53 ` Jing-Ting Wu
2022-05-19 12:53 ` Jing-Ting Wu
2022-05-19 13:14 ` Peter Zijlstra
2022-05-19 13:14 ` Peter Zijlstra
2022-05-19 13:14 ` Peter Zijlstra
2022-05-19 13:19 ` Peter Zijlstra [this message]
2022-05-19 13:19 ` Peter Zijlstra
2022-05-19 13:19 ` Peter Zijlstra
2022-05-19 13:47 ` Peter Zijlstra
2022-05-19 13:47 ` Peter Zijlstra
2022-05-19 13:47 ` Peter Zijlstra
2022-05-23 7:12 ` [SPAM]Re: " Jing-Ting Wu
2022-05-23 7:12 ` Jing-Ting Wu
2022-05-26 5:57 ` Jing-Ting Wu
2022-05-26 5:57 ` Jing-Ting Wu
2022-06-02 16:15 ` Jing-Ting Wu
2022-06-02 16:15 ` Jing-Ting Wu
2022-06-07 20:40 ` Peter Zijlstra
2022-06-07 20:40 ` Peter Zijlstra
2022-06-07 21:39 ` [PATCH] sched: Fix balance_push() vs __sched_setscheduler() Peter Zijlstra
2022-06-07 21:39 ` Peter Zijlstra
2022-06-07 21:39 ` Peter Zijlstra
2022-06-08 14:16 ` Jing-Ting Wu
2022-06-08 14:16 ` Jing-Ting Wu
2022-06-08 14:16 ` Jing-Ting Wu
2022-06-08 14:48 ` Peter Zijlstra
2022-06-08 14:48 ` Peter Zijlstra
2022-06-08 14:48 ` Peter Zijlstra
2022-06-13 8:29 ` [tip: sched/urgent] " tip-bot2 for Peter Zijlstra
[not found] <6013fb81cdb18892b75c796ab0e6756ee0e9cf71.camel@mediatek.com>
[not found] ` <a34049745934652483e3958e0a030a45b6fcfb40.camel@mediatek.com>
2022-05-06 7:47 ` [Bug] Race condition between CPU hotplug off flow and __sched_setscheduler() Peter Zijlstra
2022-05-06 7:47 ` Peter Zijlstra
2022-05-06 7:47 ` Peter Zijlstra
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