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[195.135.220.15]) by mx.google.com with ESMTPS id l15si26228769ejx.299.2019.08.05.05.05.26 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 05 Aug 2019 05:05:26 -0700 (PDT) Received-SPF: softfail (google.com: domain of transitioning mhocko@kernel.org does not designate 195.135.220.15 as permitted sender) client-ip=195.135.220.15; Authentication-Results: mx.google.com; spf=softfail (google.com: domain of transitioning mhocko@kernel.org does not designate 195.135.220.15 as permitted sender) smtp.mailfrom=mhocko@kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=kernel.org X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id A26EBADAA; Mon, 5 Aug 2019 12:05:26 +0000 (UTC) Date: Mon, 5 Aug 2019 14:05:25 +0200 From: Michal Hocko To: Vlastimil Babka Cc: Pankaj Suryawanshi , linux-kernel@vger.kernel.org, linux-mm@kvack.org, pankaj.suryawanshi@einfochips.com Subject: Re: oom-killer Message-ID: <20190805120525.GL7597@dhcp22.suse.cz> References: <20190805112437.GF7597@dhcp22.suse.cz> <0821a17d-1703-1b82-d850-30455e19e0c1@suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <0821a17d-1703-1b82-d850-30455e19e0c1@suse.cz> User-Agent: Mutt/1.10.1 (2018-07-13) X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Mon 05-08-19 13:56:20, Vlastimil Babka wrote: > On 8/5/19 1:24 PM, Michal Hocko wrote: > >> [ 727.954355] CPU: 0 PID: 56 Comm: kworker/u8:2 Tainted: P O 4.14.65 #606 > > [...] > >> [ 728.029390] [] (oom_kill_process) from [] (out_of_memory+0x140/0x368) > >> [ 728.037569] r10:00000001 r9:c12169bc r8:00000041 r7:c121e680 r6:c1216588 r5:dd347d7c > [ 728.045392] r4:d5737080 > >> [ 728.047929] [] (out_of_memory) from [] (__alloc_pages_nodemask+0x1178/0x124c) > >> [ 728.056798] r7:c141e7d0 r6:c12166a4 r5:00000000 r4:00001155 > >> [ 728.062460] [] (__alloc_pages_nodemask) from [] (copy_process.part.5+0x114/0x1a28) > >> [ 728.071764] r10:00000000 r9:dd358000 r8:00000000 r7:c1447e08 r6:c1216588 r5:00808111 > >> [ 728.079587] r4:d1063c00 > >> [ 728.082119] [] (copy_process.part.5) from [] (_do_fork+0xd0/0x464) > >> [ 728.090034] r10:00000000 r9:00000000 r8:dd008400 r7:00000000 r6:c1216588 r5:d2d58ac0 > >> [ 728.097857] r4:00808111 > > > > The call trace tells that this is a fork (of a usermodhlper but that is > > not all that important. > > [...] > >> [ 728.260031] DMA free:17960kB min:16384kB low:25664kB high:29760kB active_anon:3556kB inactive_anon:0kB active_file:280kB inactive_file:28kB unevictable:0kB writepending:0kB present:458752kB managed:422896kB mlocked:0kB kernel_stack:6496kB pagetables:9904kB bounce:0kB free_pcp:348kB local_pcp:0kB free_cma:0kB > >> [ 728.287402] lowmem_reserve[]: 0 0 579 579 > > > > So this is the only usable zone and you are close to the min watermark > > which means that your system is under a serious memory pressure but not > > yet under OOM for order-0 request. The situation is not great though > > Looking at lowmem_reserve above, wonder if 579 applies here? What does > /proc/zoneinfo say? This is GFP_KERNEL request essentially so there shouldn't be any lowmem reserve here, no? -- Michal Hocko SUSE Labs