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Subject: Re: [ANNOUNCE] v5.14-rc5-rt8
To:     Mike Galbraith <efault@gmx.de>,
        Clark Williams <williams@redhat.com>,
        Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc:     Thomas Gleixner <tglx@linutronix.de>,
        LKML <linux-kernel@vger.kernel.org>,
        RT <linux-rt-users@vger.kernel.org>
References: <20210810163731.2qvfuhenolq2gdlv@linutronix.de>
 <20210812151803.52f84aaf@theseus.lan>
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 <522000b97adcfbc581e7e5ed1afc94519b1388b8.camel@gmx.de>
From:   Vlastimil Babka <vbabka@suse.cz>
Message-ID: <94d74c8a-1e10-2500-468a-11c0ae7e2417@suse.cz>
Date:   Sat, 14 Aug 2021 20:28:44 +0200
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On 8/14/21 7:33 AM, Mike Galbraith wrote:
> On Fri, 2021-08-13 at 12:56 +0200, Mike Galbraith wrote:
>> On Thu, 2021-08-12 at 15:18 -0500, Clark Williams wrote:
>>>
>>> Sebastian, et al,
>>>
>>> Got the following panic running v5.14-rc5-rt8:
>>>
>>> ...
>>
>>> Config is attached.
>>>
>>> I was running the rteval script that kicks off parallel kernel builds
>>> and hackbench runs as loads and runs cyclictest with a thread on each
>>> core:
>>>
>>> $ sudo rteval --duration=10m
>>
>> It took my box more than 10 minutes to explode, but with all those
>> debug options turned on, it did manage to do so in fairly short order.
>>
>> Off to build a fixed up 5.13-rt...
> 
> ...and it reproduced.  Transplanted 5.12-rt slub seems stable in both
> 5.1[34]-rt trees FWIW.

Why didn't you see it in earlier testing though? What's different now.

> 	-Mike
> 
>