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_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 98C51C3A59F for ; Thu, 29 Aug 2019 12:21:04 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 63CAF22CF5 for ; Thu, 29 Aug 2019 12:21:04 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 63CAF22CF5 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id D6C2B6B0006; Thu, 29 Aug 2019 08:21:03 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id D44266B000C; Thu, 29 Aug 2019 08:21:03 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id C32A56B000D; Thu, 29 Aug 2019 08:21:03 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0196.hostedemail.com [216.40.44.196]) by kanga.kvack.org (Postfix) with ESMTP id A2F476B0006 for ; Thu, 29 Aug 2019 08:21:03 -0400 (EDT) Received: from smtpin30.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with SMTP id 443AF180AD7C1 for ; Thu, 29 Aug 2019 12:21:03 +0000 (UTC) X-FDA: 75875374806.30.quill22_26403f1c3f02e X-HE-Tag: quill22_26403f1c3f02e X-Filterd-Recvd-Size: 3952 Received: from mx1.suse.de (mx2.suse.de [195.135.220.15]) by imf08.hostedemail.com (Postfix) with ESMTP for ; Thu, 29 Aug 2019 12:21:02 +0000 (UTC) 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 23424AC97; Thu, 29 Aug 2019 12:21:01 +0000 (UTC) Date: Thu, 29 Aug 2019 14:20:59 +0200 From: Michal Hocko To: David Hildenbrand Cc: "Aneesh Kumar K.V" , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Alexander Duyck , Andrew Morton , Andy Lutomirski , Anshuman Khandual , Arun KS , Benjamin Herrenschmidt , Borislav Petkov , Catalin Marinas , Christian Borntraeger , Christophe Leroy , Dan Williams , Dave Hansen , Fenghua Yu , Gerald Schaefer , Greg Kroah-Hartman , Halil Pasic , Heiko Carstens , "H. Peter Anvin" , Ingo Molnar , Ira Weiny , Jason Gunthorpe , Johannes Weiner , Jun Yao , Logan Gunthorpe , Mark Rutland , Masahiro Yamada , "Matthew Wilcox (Oracle)" , Mel Gorman , Michael Ellerman , Mike Rapoport , Oscar Salvador , Paul Mackerras , Pavel Tatashin , Pavel Tatashin , Peter Zijlstra , Qian Cai , Rich Felker , Robin Murphy , Steve Capper , Thomas Gleixner , Tom Lendacky , Tony Luck , Vasily Gorbik , Vlastimil Babka , Wei Yang , Wei Yang , Will Deacon , Yoshinori Sato , Yu Zhao Subject: Re: [PATCH v2 0/6] mm/memory_hotplug: Consider all zones when removing memory Message-ID: <20190829122059.GF28313@dhcp22.suse.cz> References: <20190826101012.10575-1-david@redhat.com> <87pnksm0zx.fsf@linux.ibm.com> <20190829083846.GC21880@dhcp22.suse.cz> <3737c4bf-46ba-789b-b49e-7c5ad630a07b@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3737c4bf-46ba-789b-b49e-7c5ad630a07b@redhat.com> 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 Thu 29-08-19 13:55:24, David Hildenbrand wrote: > On 29.08.19 10:38, Michal Hocko wrote: > > On Mon 26-08-19 20:23:38, Aneesh Kumar K.V wrote: > > [...] > >> I did report a variant of the issue at > >> > >> https://lore.kernel.org/linux-mm/20190514025354.9108-1-aneesh.kumar@linux.ibm.com/ > > > > Is this an instance of the same problem noticed > > http://lkml.kernel.org/r/20190725023100.31141-3-t-fukasawa@vx.jp.nec.com > > and > > http://lkml.kernel.org/r/20190828080006.GG7386@dhcp22.suse.cz > > ? > > > > I think it is related as far as I can tell. I think I could also use > pfn_zone_device_reserved() to skip over uninitialized memmaps in the > zone shrinking code. No, we do not want to special case this. We should be able to make these struct page initialized. -- Michal Hocko SUSE Labs