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From: Mel Gorman <mgorman@techsingularity.net>
To: Mike Galbraith <efault@gmx.de>
Cc: lkml <linux-kernel@vger.kernel.org>
Subject: Re: mm: LTP/memcg testcase regression induced by 8cd7c588decf..66ce520bb7c2 series
Date: Tue, 23 Nov 2021 09:13:04 +0000	[thread overview]
Message-ID: <20211123091304.GC3366@techsingularity.net> (raw)
In-Reply-To: <99e779783d6c7fce96448a3402061b9dc1b3b602.camel@gmx.de>

On Sun, Nov 21, 2021 at 11:57:20AM +0100, Mike Galbraith wrote:
> Greetings,
> 
> FYI, something in this series causes LTP controllers::memcg_regression
> testcase to hang forever.  Verified via brute force revert of the lot.
> 
> After letting box moan for 4.5 hours, I poked ^C repeatedly, but runltp
> didn't exit/recover gracefully, and ps hung, so I nuked the box.  All
> memcg_test_1 instances were stuck in reclaim_throttle().
> 

I'll see can I reproduce this but do you know offhand what the test is
doing and what the expected outcome is? A possibility is that this is a
test that is driving the machine near OOM (or at least memcg OOM) and
getting throttled instead of getting killed.

-- 
Mel Gorman
SUSE Labs

  parent reply	other threads:[~2021-11-23  9:13 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-21 10:57 Mike Galbraith
2021-11-21 13:51 ` Thorsten Leemhuis
2021-11-22  6:46   ` Mike Galbraith
2021-11-22  7:41     ` Mike Galbraith
2021-11-23  9:13 ` Mel Gorman [this message]
2021-11-23 11:06   ` Mike Galbraith
2021-11-23 11:18   ` Mike Galbraith
2021-11-23 13:12     ` Mike Galbraith
2021-11-23 14:28       ` Mike Galbraith
2021-11-24 14:56     ` Mel Gorman
2021-11-24 16:21       ` Mike Galbraith

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