From: Sachin Sant <sachinp@linux.vnet.ibm.com>
To: Vincent Guittot <vincent.guittot@linaro.org>
Cc: Peter Zijlstra <peterz@infradead.org>, Odin Ugedal <odin@uged.al>,
linuxppc-dev@lists.ozlabs.org,
open list <linux-kernel@vger.kernel.org>
Subject: Re: [powerpc][5.13.0-rc7] Kernel warning (kernel/sched/fair.c:401) while running LTP tests
Date: Mon, 21 Jun 2021 23:01:51 +0530 [thread overview]
Message-ID: <14EEE4A4-B2B1-4D0C-B2F6-BDB7C11B05DE@linux.vnet.ibm.com> (raw)
In-Reply-To: <CAKfTPtACzzoGhDFW0bTGgZRPB=3LR6kSwuUOrcKDFTAJ7BhTFQ@mail.gmail.com>
>>> Any thoughts Vincent?
>>
>>
>> I would prefer that we use the reason of adding the cfs in the list instead.
>>
>> Something like the below should also fixed the problem. It is based on a
>> proposal I made to Rik sometimes ago when he tried to flatten the rq:
>> https://lore.kernel.org/lkml/20190906191237.27006-6-riel@surriel.com/
>>
>> This will ensure that a cfs is added in the list whenever one of its child
>> is still in the list.
>
> Could you confirm that this patch fixes the problem for you too ?
>
Thanks for the fix.
The patch fixes the reported problem. The test ran to completion without
any failure.
Reported-by: Sachin Sant <sachinp@linux.vnet.ibm.com>
Tested-by: Sachin Sant <sachinp@linux.vnet.ibm.com>
-Sachin
next prev parent reply other threads:[~2021-06-21 17:32 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-21 6:32 Sachin Sant
2021-06-21 9:39 ` Odin Ugedal
2021-06-21 9:50 ` Vincent Guittot
2021-06-21 9:54 ` Odin Ugedal
2021-06-21 10:57 ` Sachin Sant
2021-06-21 11:04 ` Odin Ugedal
2021-06-21 12:42 ` Odin Ugedal
2021-06-21 16:22 ` Vincent Guittot
2021-06-21 16:45 ` Odin Ugedal
2021-06-21 17:07 ` Vincent Guittot
2021-06-21 17:09 ` Vincent Guittot
2021-06-21 17:31 ` Sachin Sant [this message]
2021-06-21 17:44 ` Vincent Guittot
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