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From: Linus Torvalds <torvalds@linux-foundation.org>
To: Guenter Roeck <linux@roeck-us.net>,
	Heiko Carstens <hca@linux.ibm.com>,
	Vasily Gorbik <gor@linux.ibm.com>,
	Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Peter Zijlstra <peterz@infradead.org>,
	linux-s390 <linux-s390@vger.kernel.org>
Subject: Re: Linux 5.14
Date: Mon, 30 Aug 2021 13:15:37 -0700	[thread overview]
Message-ID: <CAHk-=wi2-1PyGj94cb+jYWb4vCcJ3JG6s6Li7c12dPOhdTs1RA@mail.gmail.com> (raw)
In-Reply-To: <20210830201225.GA2671970@roeck-us.net>

On Mon, Aug 30, 2021 at 1:12 PM Guenter Roeck <linux@roeck-us.net> wrote:
>
> So far so good, but there is a brand new runtime warning, seen when booting
> s390 images.
>
> [    3.218816] ------------[ cut here ]------------
> [    3.219010] WARNING: CPU: 1 PID: 0 at kernel/sched/core.c:5779 sched_core_cpu_starting+0x172/0x180
> [    3.222845] Call Trace:
> [    3.222992]  [<0000000000186e86>] sched_core_cpu_starting+0x176/0x180
> [    3.223114] ([<0000000000186dc4>] sched_core_cpu_starting+0xb4/0x180)
> [    3.223182]  [<00000000001963e4>] sched_cpu_starting+0x2c/0x68
> [    3.223243]  [<000000000014f288>] cpuhp_invoke_callback+0x318/0x970
> [    3.223304]  [<000000000014f970>] cpuhp_invoke_callback_range+0x90/0x108
> [    3.223364]  [<000000000015123c>] notify_cpu_starting+0x84/0xa8
> [    3.223426]  [<0000000000117bca>] smp_init_secondary+0x72/0xf0
> [    3.223492]  [<0000000000117846>] smp_start_secondary+0x86/0x90
>
> Commit 3c474b3239f12 ("sched: Fix Core-wide rq->lock for uninitialized
> CPUs") seems to be the culprit. Indeed, the warning is gone after reverting
> this commit.

Ouch, not great timing.

Adding the s390 people to the cc too, just to make sure everybody
involved is aware.

           Linus

  reply	other threads:[~2021-08-30 20:15 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-29 22:19 Linus Torvalds
2021-08-30  9:11 ` Sudip Mukherjee
2021-08-30 15:17   ` Linus Torvalds
2021-09-12 19:29     ` Sudip Mukherjee
2021-08-30  9:39 ` Andy Shevchenko
2021-08-30 11:28   ` Andy Shevchenko
2021-08-30 20:12 ` Guenter Roeck
2021-08-30 20:15   ` Linus Torvalds [this message]
2021-08-30 21:28     ` Peter Zijlstra
2021-08-31 11:04       ` Heiko Carstens
2021-08-30 20:32   ` Thomas Gleixner
2021-08-30 23:57     ` Thomas Gleixner

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