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=-2.5 required=3.0 tests=MAILING_LIST_MULTI,SPF_PASS, USER_AGENT_MUTT autolearn=ham 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 55FD2C43441 for ; Thu, 15 Nov 2018 13:19:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 20AA72081C for ; Thu, 15 Nov 2018 13:19:33 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 20AA72081C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388331AbeKOX1U (ORCPT ); Thu, 15 Nov 2018 18:27:20 -0500 Received: from mx2.suse.de ([195.135.220.15]:34418 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728931AbeKOX1U (ORCPT ); Thu, 15 Nov 2018 18:27:20 -0500 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 E1B14AD8F; Thu, 15 Nov 2018 13:19:28 +0000 (UTC) Date: Thu, 15 Nov 2018 14:19:27 +0100 From: Michal Hocko To: Baoquan He Cc: David Hildenbrand , linux-mm@kvack.org, linux-kernel@vger.kernel.org, akpm@linux-foundation.org, aarcange@redhat.com Subject: Re: Memory hotplug softlock issue Message-ID: <20181115131927.GT23831@dhcp22.suse.cz> References: <20181114070909.GB2653@MiWiFi-R3L-srv> <5a6c6d6b-ebcd-8bfa-d6e0-4312bfe86586@redhat.com> <20181114090134.GG23419@dhcp22.suse.cz> <20181114145250.GE2653@MiWiFi-R3L-srv> <20181114150029.GY23419@dhcp22.suse.cz> <20181115051034.GK2653@MiWiFi-R3L-srv> <20181115073052.GA23831@dhcp22.suse.cz> <20181115075349.GL2653@MiWiFi-R3L-srv> <20181115083055.GD23831@dhcp22.suse.cz> <20181115131211.GP2653@MiWiFi-R3L-srv> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20181115131211.GP2653@MiWiFi-R3L-srv> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu 15-11-18 21:12:11, Baoquan He wrote: > On 11/15/18 at 09:30am, Michal Hocko wrote: [...] > > It would be also good to find out whether this is fs specific. E.g. does > > it make any difference if you use a different one for your stress > > testing? > > Created a ramdisk and put stress bin there, then run stress -m 200, now > seems it's stuck in libc-2.28.so migrating. And it's still xfs. So now xfs > is a big suspect. At bottom I paste numactl printing, you can see that it's > the last 4G. > > Seems it's trying to migrate libc-2.28.so, but stress program keeps trying to > access and activate it. Is this still with faultaround disabled? I have seen exactly same pattern in the bug I am working on. It was ext4 though. > [ 5055.461652] migrating pfn 190f4fb3e failed > [ 5055.461671] page:ffffea643d3ecf80 count:257 mapcount:251 mapping:ffff888e7a6ac528 index:0x85 > [ 5055.474734] xfs_address_space_operations [xfs] > [ 5055.474742] name:"libc-2.28.so" > [ 5055.481070] flags: 0x1dfffffc0000026(referenced|uptodate|active) > [ 5055.490329] raw: 01dfffffc0000026 ffffc900000e3d80 ffffc900000e3d80 ffff888e7a6ac528 > [ 5055.498080] raw: 0000000000000085 0000000000000000 000000fc000000f9 ffff88810a8f2000 > [ 5055.505823] page->mem_cgroup:ffff88810a8f2000 > [ 5056.335970] migrating pfn 190f4fb3e failed > [ 5056.335990] page:ffffea643d3ecf80 count:255 mapcount:250 mapping:ffff888e7a6ac528 index:0x85 > [ 5056.348994] xfs_address_space_operations [xfs] > [ 5056.348998] name:"libc-2.28.so" > [ 5056.353555] flags: 0x1dfffffc0000026(referenced|uptodate|active) > [ 5056.364680] raw: 01dfffffc0000026 ffffc900000e3d80 ffffc900000e3d80 ffff888e7a6ac528 > [ 5056.372428] raw: 0000000000000085 0000000000000000 000000fc000000f9 ffff88810a8f2000 > [ 5056.380172] page->mem_cgroup:ffff88810a8f2000 > [ 5057.332806] migrating pfn 190f4fb3e failed > [ 5057.332821] page:ffffea643d3ecf80 count:261 mapcount:250 mapping:ffff888e7a6ac528 index:0x85 > [ 5057.345889] xfs_address_space_operations [xfs] > [ 5057.345900] name:"libc-2.28.so" > [ 5057.350451] flags: 0x1dfffffc0000026(referenced|uptodate|active) > [ 5057.359707] raw: 01dfffffc0000026 ffffc900000e3d80 ffffc900000e3d80 ffff888e7a6ac528 > [ 5057.369285] raw: 0000000000000085 0000000000000000 000000fc000000f9 ffff88810a8f2000 > [ 5057.377030] page->mem_cgroup:ffff88810a8f2000 > [ 5058.285457] migrating pfn 190f4fb3e failed > [ 5058.285489] page:ffffea643d3ecf80 count:257 mapcount:250 mapping:ffff888e7a6ac528 index:0x85 > [ 5058.298544] xfs_address_space_operations [xfs] > [ 5058.298556] name:"libc-2.28.so" > [ 5058.303092] flags: 0x1dfffffc0000026(referenced|uptodate|active) > [ 5058.314358] raw: 01dfffffc0000026 ffffc900000e3d80 ffffc900000e3d80 ffff888e7a6ac528 > [ 5058.322109] raw: 0000000000000085 0000000000000000 000000fc000000f9 ffff88810a8f2000 > [ 5058.329848] page->mem_cgroup:ffff88810a8f2000 -- Michal Hocko SUSE Labs