From: Philippe Gerum <rpm@xenomai.org>
To: Bryan Butler <Bryan.Butler@kratosdefense.com>
Cc: Russell Johnson <russell.johnson@kratosdefense.com>,
"xenomai@lists.linux.dev" <xenomai@lists.linux.dev>
Subject: Re: [External] - Re: System hanging when using condition variables
Date: Sun, 25 Sep 2022 18:32:58 +0200 [thread overview]
Message-ID: <87edvz8l5i.fsf@xenomai.org> (raw)
In-Reply-To: <87illb8pfs.fsf@xenomai.org>
Philippe Gerum <rpm@xenomai.org> writes:
> Philippe Gerum <rpm@xenomai.org> writes:
>
>> Bryan Butler <Bryan.Butler@kratosdefense.com> writes:
>>
>>> I have another system that behaves slightly differently. When it hits the watchdog, here's what I get:
>>>
>>
>> I have been able to reproduce a bug on an armv7 SoC with the test case
>> you provided. Sometimes the RCU stall detector triggers, sometimes it's
>> a plain hard lockup. I believe these are symptoms of the same bug, which
>> _seems_ to hide in the PI chain management. I'm on it.
>
> Actually, the PI chain was 'only' collateral damage. The bug was a
> fairly silly ABBA deadlock issue elsewhere, in the monitor
> implementation. A fix is under stress test here, I'll follow up with a
> patch asap.
>
> Thanks for the fine test case, having it made a huge difference once
> again.
Please test this branch [1] which addresses the issue, passed a 1h
runtime stress test here. I'll wait for a confirmation from your end
with the real app before merging these bits to the mainline EVL code.
TIA,
[1] https://source.denx.de/Xenomai/xenomai4/linux-evl/-/tree/testing/fix-abba
--
Philippe.
next prev parent reply other threads:[~2022-09-25 16:38 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-19 21:38 System hanging when using condition variables Russell Johnson
2022-09-20 6:55 ` Philippe Gerum
2022-09-20 14:31 ` [External] - " Russell Johnson
2022-09-21 14:53 ` Russell Johnson
2022-09-22 14:26 ` Philippe Gerum
2022-09-22 15:25 ` [External] - " Bryan Butler
2022-09-23 19:56 ` Bryan Butler
2022-09-24 8:21 ` Philippe Gerum
2022-09-25 14:59 ` Philippe Gerum
2022-09-25 16:32 ` Philippe Gerum [this message]
2022-09-26 14:20 ` Bryan Butler
2022-09-27 22:05 ` Russell Johnson
2022-09-27 23:04 ` Russell Johnson
2022-09-28 1:08 ` Bryan Butler
2022-09-28 10:06 ` Philippe Gerum
2022-09-28 10:37 ` Philippe Gerum
2022-09-28 9:59 ` Philippe Gerum
2022-09-28 18:35 ` Russell Johnson
2022-09-29 7:04 ` Philippe Gerum
2022-09-29 18:32 ` Russell Johnson
2022-10-01 4:38 ` Russell Johnson
2022-10-04 15:50 ` Philippe Gerum
2022-10-10 17:04 ` Russell Johnson
2022-10-12 16:11 ` Russell Johnson
2022-10-12 16:24 ` Eric Kuzara
2022-11-03 18:13 ` Philippe Gerum
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