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From: Mike Galbraith <efault@gmx.de>
To: Thorsten Leemhuis <regressions@leemhuis.info>,
	lkml <linux-kernel@vger.kernel.org>,
	"regressions@lists.linux.dev" <regressions@lists.linux.dev>
Cc: Mel Gorman <mgorman@techsingularity.net>
Subject: Re: mm: LTP/memcg testcase regression induced by 8cd7c588decf..66ce520bb7c2 series
Date: Mon, 22 Nov 2021 08:41:08 +0100	[thread overview]
Message-ID: <813ba08684c710a4c3d82d7f894c37838a8cec5a.camel@gmx.de> (raw)
In-Reply-To: <723736b7736da3810cab582dee4591fec063618b.camel@gmx.de>

On Mon, 2021-11-22 at 07:46 +0100, Mike Galbraith wrote:
> 
> #--------------------------------------------------------------------
> -------
> # Bug:    The bug was, while forking mass processes, trigger
> memcgroup OOM,
> #         then NULL pointer dereference may be hit.
> # Kernel: 2.6.25-rcX
> # Links:  http://lkml.org/lkml/2008/4/14/38
> # Fix:    commit e115f2d89253490fb2dbf304b627f8d908df26f1
> #--------------------------------------------------------------------
> -------
> test_1()
> {       
>         mkdir memcg/0/
>         echo 0 > memcg/0/memory.limit_in_bytes
>         
>         ./memcg_test_1
>         
>         rmdir memcg/0/
>         
>         check_kernel_bug 
>         if [ $? -eq 1 ]; then
>                 tst_resm TPASS "no kernel bug was found"
>         fi
> }
> 
> 
> I'm gonna just comment the little bugger out as obsolete and walk
> away.

test2() and test3() then pass, but test_4() hangs, and looks like it
should not, so...

	-Mike

  reply	other threads:[~2021-11-22  7:41 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 [this message]
2021-11-23  9:13 ` Mel Gorman
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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