Re: [sched] 663017c554: WARNING:at_kernel/sched/core.c:#scheduler_tick

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To: kernel test robot <oliver.sang@xxxxxxxxx>
Subject: Re: [sched] 663017c554: WARNING:at_kernel/sched/core.c:#scheduler_tick
From: Josh Don <joshdon@xxxxxxxxxx>
Date: Thu, 18 Mar 2021 13:41:59 -0700
Cc: 0day robot <lkp@xxxxxxxxx>, LKML <linux-kernel@xxxxxxxxxxxxxxx>, lkp@xxxxxxxxxxxx, Ingo Molnar <mingo@xxxxxxxxxx>, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Juri Lelli <juri.lelli@xxxxxxxxxx>, Vincent Guittot <vincent.guittot@xxxxxxxxxx>, Dietmar Eggemann <dietmar.eggemann@xxxxxxx>, Steven Rostedt <rostedt@xxxxxxxxxxx>, Ben Segall <bsegall@xxxxxxxxxx>, Mel Gorman <mgorman@xxxxxxx>, Daniel Bristot de Oliveira <bristot@xxxxxxxxxx>, Luis Chamberlain <mcgrof@xxxxxxxxxx>, Kees Cook <keescook@xxxxxxxxxxxx>, Iurii Zaikin <yzaikin@xxxxxxxxxx>, linux-fsdevel@xxxxxxxxxxxxxxx, David Rientjes <rientjes@xxxxxxxxxx>, Oleg Rombakh <olegrom@xxxxxxxxxx>, Paul Turner <pjt@xxxxxxxxxx>, Aubrey Li <aubrey.li@xxxxxxxxxxxxxxx>, Chen Yu <yu.c.chen@xxxxxxxxx>
In-reply-to: <20210318143158.GB17012@xsang-OptiPlex-9020>

The warning is WAI (holding spinlock for 100ms). However, since this
is expected for locktorture, it makes sense to not have the warning
enabled while the test is running. I can add that to the patch.

References:
- [PATCH] sched: Warn on long periods of pending need_resched
  - From: Josh Don
- [sched] 663017c554: WARNING:at_kernel/sched/core.c:#scheduler_tick
  - From: kernel test robot

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