Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
From:   Waiman Long <llong@redhat.com>
Subject: Re: [RFC PATCH] mm/oom_kill: allow oom kill allocating task for
 non-global case
To:     Michal Hocko <mhocko@suse.com>, Waiman Long <llong@redhat.com>
Cc:     Shakeel Butt <shakeelb@google.com>,
        Aaron Tomlin <atomlin@redhat.com>,
        Linux MM <linux-mm@kvack.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Vlastimil Babka <vbabka@suse.cz>,
        LKML <linux-kernel@vger.kernel.org>
References: <20210607163103.632681-1-atomlin@redhat.com>
 <c16893a9-35e2-7625-d7f3-83488f874040@redhat.com>
 <CALvZod4eUoquGTQ5AsWgbWTQyqtCNNwb-9+fRw_ZPavH-r9dbA@mail.gmail.com>
 <dc7f54eb-933e-5bbb-7959-815dfbfcc836@redhat.com>
 <YL5tqdw+iWLLavxV@dhcp22.suse.cz>
 <6d23ce58-4c4b-116a-6d74-c2cf4947492b@redhat.com>
 <YL51Tp/3jVHUrpuj@dhcp22.suse.cz> <YL57rLFwAo7EpYeH@dhcp22.suse.cz>
Message-ID: <353d012f-e8d4-c54c-b33e-54737e1a0115@redhat.com>
Date:   Mon, 7 Jun 2021 16:44:09 -0400
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101
 Thunderbird/78.9.0
MIME-Version: 1.0
In-Reply-To: <YL57rLFwAo7EpYeH@dhcp22.suse.cz>
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Transfer-Encoding: 8bit
Content-Language: en-US
Precedence: bulk

On 6/7/21 4:03 PM, Michal Hocko wrote:
> On Mon 07-06-21 21:36:47, Michal Hocko wrote:
>> On Mon 07-06-21 15:18:38, Waiman Long wrote:
> [...]
>>> A partial OOM report below:
>> Do you happen to have the full report?
>>
>>> [ 8221.433608] memory: usage 21280kB, limit 204800kB, failcnt 49116
>>>    :
>>> [ 8227.239769] [ pid ]   uid  tgid total_vm      rss pgtables_bytes swapents  oom_score_adj name
>>> [ 8227.242495] [1611298]     0 1611298    35869      635 167936        0         -1000 conmon
>>> [ 8227.242518] [1702509]     0 1702509    35869      701 176128        0         -1000 conmon
>>> [ 8227.242522] [1703345] 1001050000 1703294   183440        0 2125824        0           999 node
>>> [ 8227.242706] Out of memory and no killable processes...
>>> [ 8227.242731] node invoked oom-killer: gfp_mask=0x6000c0(GFP_KERNEL), nodemask=(null), order=0, oom_score_adj=999
> Btw it is surprising to not see _GFP_ACCOUNT here.

There are a number of OOM kills in the kernel log and none of the tasks 
that invoke oom-killer has _GFP_ACCOUNT flag set.

Regards,
Longman