From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6887AC433DF for ; Tue, 19 May 2020 08:11:48 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 2FA77207D8 for ; Tue, 19 May 2020 08:11:48 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2FA77207D8 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arndb.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id AF887900003; Tue, 19 May 2020 04:11:47 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id AA8C6900002; 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Tue, 19 May 2020 10:11:45 +0200 Received: by mail-qk1-f180.google.com with SMTP id i14so13743195qka.10 for ; Tue, 19 May 2020 01:11:44 -0700 (PDT) X-Gm-Message-State: AOAM531TfU2Do8dZUucLZFADa5Mf40G2eE2V9r/W1cr5TtEdXxGBwXlv x6arJjA9B/rS3Mfv53kSqs3GMX2y0+rSK95VMug= X-Google-Smtp-Source: ABdhPJx6XgbSzoT+qvNjdY9pWlEyJs3vEhdbk/bed0qIGoM1ay/d49G6y8ZoK1QmCZ9OPzgrrkMiO8yQSdyKoKqOetU= X-Received: by 2002:a37:aa82:: with SMTP id t124mr18447360qke.3.1589875903344; Tue, 19 May 2020 01:11:43 -0700 (PDT) MIME-Version: 1.0 References: <20200501135806.4eebf0b92f84ab60bba3e1e7@linux-foundation.org> <20200519075213.GF32497@dhcp22.suse.cz> In-Reply-To: <20200519075213.GF32497@dhcp22.suse.cz> From: Arnd Bergmann Date: Tue, 19 May 2020 10:11:25 +0200 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: mm: mkfs.ext4 invoked oom-killer on i386 - pagecache_get_page To: Michal Hocko Cc: Naresh Kamboju , "Linux F2FS DEV, Mailing List" , linux-ext4 , linux-block , Andrew Morton , open list , Linux-Next Mailing List , linux-mm , Andreas Dilger , Jaegeuk Kim , "Theodore Ts'o" , Chao Yu , Hugh Dickins , Andrea Arcangeli , Matthew Wilcox , Chao Yu , lkft-triage@lists.linaro.org Content-Type: text/plain; charset="UTF-8" X-Provags-ID: V03:K1:iQLPSEVy0hvAkdzDTG1XBXU7Drr2FfEJ47ALzLxxWv5RDTTf1AS byaJdszKz8HSkkhHaIz+EnXSqUZn3Hogk3vfSQP+rgAq6t+3x1PzG0IC6hCE4DsPLLjqcOD 7zkJxzl8jHddzpUJ0gKCUosoRKDhTYvVmG8jEMiY++XFVnV/Q8YMmHTu1xdlf+TUOaGQT3o GiOBngn9ctaNv5SdfJEuQ== X-UI-Out-Filterresults: notjunk:1;V03:K0:nymxg80crAg=:RUUaRwvc+P9EDcH285wjYe FMDweMN4CgVMDvPZcDJ/26ok5/Pcj9sTOBWbtWSUXPkWo3Y+Q9yJtSg5Rts6AJV43zmYs+Y/0 5FFzikPfTFAvL/vTajyqSI1LAL2kOT8KyxuxlMMxuCfTUTjEhezYSNULvdbuaQI4FaULllw64 HCCnO3Bi6h11bp48g/AAVOUskOIuF3bubh9GfyblaZj25VSRdcdaTqYbay+wzHw8SbQ45ozVE fZyIg4TXaBgMhuVZ2k2oS5UPJz6Hyz8rfE7aYI/5Gq/D4uNkeSXlC9a4yP6j7kG/s/hchVRlB ItIBm7Myv6kPLSstB68JfdYkJF6OthpfXbUoIwf7Vzd7jzI0sseFcCIripdfrlt1F0WkuwbYX Q6uJoG8l0+5Z4fjD08267LOZCpa0Xcp8BmxloRAMx4gPAG5W9+bsrVRaC5r6J8YuTvwCWUHdn V+l7A4bAOtoW/zvY83LIrrE1lqoIZEHIkj6BePmPNTgzxlRmuQ74q6dqmEHQ/6Yr7AZxJfeqh SgP43VBG1ql4jdEiSn7lnpOUtpAXnMxw2duLNWp9+mTZ2Go+h4kJHLD4OqDToWAODFY60a1UX 96dbcG1G+uKLG8UYmtDZlzJDMz7xeQWOYEtSWdfIMV7aRBEAI5P+optVPXKk+1Sbnv11J9eeY IQcgArsgcd/ExfWcwxFVdoAOvDRU29GZtiGDRluvSdikq0tr47B6q4NZLtn8nlEzQvYEwfxFL kFQYhLaoljA06M8bSpUezwKwMev++6J7In3lKgGYeSO6qpTWodbCO50I8K5v2nWugUQJL142G JELjWTuiZOCtQiu5cb3wnCbrNmOUztTcL/x8RQOWdwLMB/AXkM= 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 Tue, May 19, 2020 at 9:52 AM Michal Hocko wrote: > > On Mon 18-05-20 19:40:55, Naresh Kamboju wrote: > > Thanks for looking into this problem. > > > > On Sat, 2 May 2020 at 02:28, Andrew Morton wrote: > > > > > > On Fri, 1 May 2020 18:08:28 +0530 Naresh Kamboju wrote: > > > > > > > mkfs -t ext4 invoked oom-killer on i386 kernel running on x86_64 device > > > > and started happening on linux -next master branch kernel tag next-20200430 > > > > and next-20200501. We did not bisect this problem. > [...] > > Creating journal (131072 blocks): [ 31.251333] mkfs.ext4 invoked > > oom-killer: gfp_mask=0x101cc0(GFP_USER|__GFP_WRITE), order=0, > > oom_score_adj=0 > [...] > > [ 31.500943] DMA free:187396kB min:22528kB low:28160kB high:33792kB > > reserved_highatomic:0KB active_anon:0kB inactive_anon:0kB > > active_file:4736kB inactive_file:431688kB unevictable:0kB > > writepending:62020kB present:783360kB managed:668264kB mlocked:0kB > > kernel_stack:888kB pagetables:0kB bounce:0kB free_pcp:880kB > > local_pcp:216kB free_cma:163840kB > > This is really unexpected. You are saying this is a regular i386 and DMA > should be bottom 16MB while yours is 780MB and the rest of the low mem > is in the Normal zone which is completely missing here. How have you got > to that configuration? I have to say I haven't seen anything like that > on i386. I think that line comes from an ARM32 beaglebone-X15 machine showing the same symptom. The i386 line from the log file that Naresh linked to at https://lkft.validation.linaro.org/scheduler/job/1406110#L1223 is less unusual: [ 34.931663] Node 0 active_anon:21464kB inactive_anon:8688kB active_file:16604kB inactive_file:849976kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:25284kB dirty:58952kB writeback:27772kB shmem:8944kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes [ 34.955523] DMA free:3356kB min:68kB low:84kB high:100kB reserved_highatomic:0KB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:11964kB unevictable:0kB writepending:11980kB present:15964kB managed:15876kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB [ 34.983385] lowmem_reserve[]: 0 825 1947 825 [ 34.987678] Normal free:3948kB min:7732kB low:8640kB high:9548kB reserved_highatomic:0KB active_anon:0kB inactive_anon:0kB active_file:1096kB inactive_file:786400kB unevictable:0kB writepending:65432kB present:884728kB managed:845576kB mlocked:0kB kernel_stack:1112kB pagetables:0kB bounce:0kB free_pcp:2908kB local_pcp:500kB free_cma:0kB [ 35.017427] lowmem_reserve[]: 0 0 8980 0 [ 35.021362] HighMem free:1049496kB min:512kB low:1748kB high:2984kB reserved_highatomic:0KB active_anon:21464kB inactive_anon:8688kB active_file:15508kB inactive_file:51612kB unevictable:0kB writepending:0kB present:1149540kB managed:1149540kB mlocked:0kB kernel_stack:0kB pagetables:712kB bounce:0kB free_pcp:1524kB local_pcp:292kB free_cma:0kB [ 35.051717] lowmem_reserve[]: 0 0 0 0 [ 35.055374] DMA: 8*4kB (UE) 1*8kB (E) 1*16kB (E) 0*32kB 0*64kB 0*128kB 1*256kB (E) 0*512kB 1*1024kB (E) 1*2048kB (E) 0*4096kB = 3384kB [ 35.067446] Normal: 27*4kB (U) 23*8kB (U) 12*16kB (UE) 12*32kB (U) 4*64kB (UE) 2*128kB (U) 2*256kB (UE) 1*512kB (E) 0*1024kB 1*2048kB (U) 0*4096kB = 4452kB [ 35.081347] HighMem: 2*4kB (UM) 0*8kB 1*16kB (M) 2*32kB (UM) 1*64kB (U) 0*128kB 1*256kB (M) 1*512kB (M) 0*1024kB 0*2048kB 256*4096kB (M) = 1049496kB Arnd