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Message-ID: <ZEl/trjF1Ic76/Ye@duo.ucw.cz>
Date:   Wed, 26 Apr 2023 21:47:02 +0200
From:   Pavel Machek <pavel@...x.de>
To:     Naresh Kamboju <naresh.kamboju@...aro.org>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Masami Hiramatsu <mhiramat@...nel.org>, stable@...r.kernel.org,
        patches@...ts.linux.dev, linux-kernel@...r.kernel.org,
        torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
        linux@...ck-us.net, shuah@...nel.org, patches@...nelci.org,
        lkft-triage@...ts.linaro.org, pavel@...x.de, jonathanh@...dia.com,
        f.fainelli@...il.com, sudipm.mukherjee@...il.com,
        srw@...dewatkins.net, rwarsow@....de,
        Mark Rutland <mark.rutland@....com>
Subject: Re: [PATCH 4.19 00/29] 4.19.282-rc1 review

Hi!

This should be show stopper, actually:

> FYI, This is not a show stopper but worth reporting.


> NOTE:
> Following kernel warning notices on stable rc  4.19.282-rc1 from the
> previous releases 4.19.279-rc1 noticed on arm64, i386 and x86_64. After
> this kernel warning the system is still stable and up and running.
> 
> This kernel is built with kselftest ftrace merge configs with all
> required Kconfigs.
> 
> [    0.000000] Linux version 4.19.279-rc1 (tuxmake@...make) (gcc
> version 11.3.0 (Debian 11.3.0-11)) #1 SMP @1679324856
> ...
> [    0.145911] ftrace: allocating 48590 entries in 190 pages
> ...
> 
> [    2.880223] WARNING: CPU: 0 PID: 0 at
> include/trace/events/lock.h:13 lock_acquire+0x142/0x150
> [    2.881454] WARNING: CPU: 1 PID: 0 at
> include/trace/events/lock.h:58 lock_release+0x1af/0x280

This indicates locking problem somewhere in cpuidle / ftrace.

I skimmed the patches, and I do not see anything obvious there. Is
there chance to do a bisection?

Best regards,
								Pavel

-- 
DENX Software Engineering GmbH,        Managing Director: Erika Unter
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany

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