Bug#963493: Repeatable hard lockup running strace testsuite on 4.19.98+ onwards

From	Steve McIntyre <steve@einval.com>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#963493: Repeatable hard lockup running strace testsuite on 4.19.98+ onwards
Date	2020-06-26 15:50 +0200
Message-ID	<AlWTT-6vN-5@gated-at.bofh.it> (permalink)
References	<AlUS6-5lp-7@gated-at.bofh.it> <AlWTT-6vN-1@gated-at.bofh.it> <AktqW-1f2-9@gated-at.bofh.it> <AlWTT-6vN-1@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Cross-posted to 2 groups.

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Hey Greg,

On Fri, Jun 26, 2020 at 03:41:32PM +0200, Greg KH wrote:
>On Fri, Jun 26, 2020 at 12:35:58PM +0100, Steve McIntyre wrote:
>> 
>> e58f543fc7c0926f31a49619c1a3648e49e8d233 is the first bad commit
>> commit e58f543fc7c0926f31a49619c1a3648e49e8d233
>> Author: Jann Horn <jannh@google.com>
>> Date:   Thu Sep 13 18:12:09 2018 +0200

...

>> Annoyingly, I can't reproduce this on my disparate other machines
>> here, suggesting it's maybe(?) timing related.
>> 
>> Hope this helps - happy to give more information, test things, etc.
>
>So if you just revert this one patch, all works well?

Correct.

>I've added the authors of the patch to the cc: list...
>
>Also, does this problem happen on Linus's tree?

Just building to check that now...

-- 
Steve McIntyre, Cambridge, UK.                                steve@einval.com
< Aardvark> I dislike C++ to start with. C++11 just seems to be
            handing rope-creating factories for users to hang multiple
            instances of themselves.

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Bug#963493: Repeatable hard lockup running strace testsuite on 4.19.98+ onwards Steve McIntyre <steve@einval.com> - 2020-06-26 15:50 +0200
  Bug#963493: Repeatable hard lockup running strace testsuite on 4.19.98+ onwards Steve McIntyre <steve@einval.com> - 2020-06-26 17:30 +0200

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