From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm0-f72.google.com (mail-wm0-f72.google.com [74.125.82.72]) by kanga.kvack.org (Postfix) with ESMTP id C2FDE6B0003 for ; Fri, 16 Feb 2018 09:02:20 -0500 (EST) Received: by mail-wm0-f72.google.com with SMTP id l7so957125wmh.4 for ; Fri, 16 Feb 2018 06:02:20 -0800 (PST) Received: from mx2.suse.de (mx2.suse.de. [195.135.220.15]) by mx.google.com with ESMTPS id h195si1279169wmd.266.2018.02.16.06.02.18 for (version=TLS1 cipher=AES128-SHA bits=128/128); Fri, 16 Feb 2018 06:02:18 -0800 (PST) Subject: Re: [PATCH] mm: don't defer struct page initialization for Xen pv guests References: <20180216133726.30813-1-jgross@suse.com> <20180216135940.GQ7275@dhcp22.suse.cz> From: Juergen Gross Message-ID: <1424bb25-7d6a-ee21-83b4-0e90369d6132@suse.com> Date: Fri, 16 Feb 2018 15:02:17 +0100 MIME-Version: 1.0 In-Reply-To: <20180216135940.GQ7275@dhcp22.suse.cz> Content-Type: text/plain; charset=utf-8 Content-Language: de-DE Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Michal Hocko Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, xen-devel@lists.xenproject.org, akpm@linux-foundation.org, stable@vger.kernel.org, Pavel Tatashin On 16/02/18 14:59, Michal Hocko wrote: > [CC Pavel] > > On Fri 16-02-18 14:37:26, Juergen Gross wrote: >> Commit f7f99100d8d95dbcf09e0216a143211e79418b9f ("mm: stop zeroing >> memory during allocation in vmemmap") broke Xen pv domains in some >> configurations, as the "Pinned" information in struct page of early >> page tables could get lost. > > Could you be more specific please? In which way? Do you want to see the resulting crash in the commit message or some more background information? > >> Avoid this problem by not deferring struct page initialization when >> running as Xen pv guest. >> >> Cc: #4.15 > Fixes: f7f99100d8d9 ("mm: stop zeroing memory during allocation in vmemmap") > > please Okay. Juergen -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org