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Subject: Re: [failures] mm-vmscan-remove-unnecessary-lruvec-adding.patch
 removed from -mm tree
From:   Qian Cai <cai@lca.pw>
In-Reply-To: <9eb3efe1-f203-c3b1-679d-5e158fd8639f@linux.alibaba.com>
Date:   Thu, 5 Mar 2020 23:46:26 -0500
Cc:     Hugh Dickins <hughd@google.com>,
        Matthew Wilcox <willy@infradead.org>,
        LKML <linux-kernel@vger.kernel.org>,
        Andrew Morton <akpm@linux-foundation.org>, aarcange@redhat.com,
        daniel.m.jordan@oracle.com, hannes@cmpxchg.org,
        khlebnikov@yandex-team.ru, kirill@shutemov.name,
        kravetz@us.ibm.com, mhocko@kernel.org, mm-commits@vger.kernel.org,
        tj@kernel.org, vdavydov.dev@gmail.com, yang.shi@linux.alibaba.com,
        linux-mm@kvack.org
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Message-Id: <1E0DE356-9F9B-4E00-9F53-85E2FED99CF2@lca.pw>
References: <20200306025041.rERhvnYmB%akpm@linux-foundation.org>
 <211632B1-2D6F-4BFA-A5A0-3030339D3D2A@lca.pw>
 <20200306033850.GO29971@bombadil.infradead.org>
 <97EE83E1-FEC9-48B6-98E8-07FB3FECB961@lca.pw>
 <alpine.LSU.2.11.2003052008510.3016@eggly.anvils>
 <9eb3efe1-f203-c3b1-679d-5e158fd8639f@linux.alibaba.com>
To:     Alex Shi <alex.shi@linux.alibaba.com>
Sender: linux-kernel-owner@vger.kernel.org
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> On Mar 5, 2020, at 11:42 PM, Alex Shi <alex.shi@linux.alibaba.com> =
wrote:
>=20
>=20
>=20
> =E5=9C=A8 2020/3/6 =E4=B8=8B=E5=8D=8812:17, Hugh Dickins =E5=86=99=E9=81=
=93:
>> On Thu, 5 Mar 2020, Qian Cai wrote:
>>>> On Mar 5, 2020, at 10:38 PM, Matthew Wilcox <willy@infradead.org> =
wrote:
>>>>=20
>>>> On Thu, Mar 05, 2020 at 10:32:18PM -0500, Qian Cai wrote:
>>>>>> On Mar 5, 2020, at 9:50 PM, akpm@linux-foundation.org wrote:
>>>>>> The patch titled
>>>>>>   Subject: mm/vmscan: remove unnecessary lruvec adding
>>>>>> has been removed from the -mm tree.  Its filename was
>>>>>>   mm-vmscan-remove-unnecessary-lruvec-adding.patch
>>>>>>=20
>>>>>> This patch was dropped because it had testing failures
>>>>> Andrew, do you have more information about this failure? I hit a =
bug
>>>>> here under memory pressure and am wondering if this is related
>>>>> which might save me some time digging=E2=80=A6
>> Very likely related.
>>=20
>=20
> Hi all,
>=20
> Apologize for the trouble!
> And Many thanks for you all for the report!
> Obviously, I missed memory stress testing which I should do. Apologize =
again!
>=20
> Qian Cai,
> Which test case are you using? Could you share the reproduce steps for =
me?


LTP oom01 in a tight loop with swap,

# i=3D0; while :; do echo $((i++)); oom01; sleep 5; done

>=20
> Hugh,
> Many thanks for help! I will seek some memory stress case and waiting =
for your case.
>=20
>=20
> Thank you all!
> Alex