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=-2.7 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 5E91BC43387 for ; Mon, 17 Dec 2018 16:03:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 26E94206A2 for ; Mon, 17 Dec 2018 16:03:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1545062636; bh=G9Xog0YEw6CvIMQ31u10PkHB8AhK6/zCFr0C53wQzrE=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=akBPtNdiyttWKCN1A+p37vLQl46gAH4r3ArIMJB42C94yKvxipChb1D7I9C+WRlF7 THdxPWLouIJUSPmr9Kcu5isF19MiYyzRjqZDPeXYt3gf54eDRaru5vtZDk0nPASIxz 5WX7HqGzSoIzI4EkHtZszgfL5oYmIAGHwFXR/ikM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388036AbeLQQDz (ORCPT ); Mon, 17 Dec 2018 11:03:55 -0500 Received: from mx2.suse.de ([195.135.220.15]:39068 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727833AbeLQQDy (ORCPT ); Mon, 17 Dec 2018 11:03:54 -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 55AFDAF17; Mon, 17 Dec 2018 16:03:52 +0000 (UTC) Date: Mon, 17 Dec 2018 17:03:50 +0100 From: Michal Hocko To: Heiko Carstens Cc: Andrew Morton , Oscar Salvador , Anshuman Khandual , Stephen Rothwell , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-next@vger.kernel.org, linux-s390@vger.kernel.org Subject: Re: [-next] lots of messages due to "mm, memory_hotplug: be more verbose for memory offline failures" Message-ID: <20181217160350.GV30879@dhcp22.suse.cz> References: <20181217155922.GC3560@osiris> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20181217155922.GC3560@osiris> 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 Mon 17-12-18 16:59:22, Heiko Carstens wrote: > Hi Michal, > > with linux-next as of today on s390 I see tons of messages like > > [ 20.536664] page dumped because: has_unmovable_pages > [ 20.536792] page:000003d081ff4080 count:1 mapcount:0 mapping:000000008ff88600 index:0x0 compound_mapcount: 0 > [ 20.536794] flags: 0x3fffe0000010200(slab|head) > [ 20.536795] raw: 03fffe0000010200 0000000000000100 0000000000000200 000000008ff88600 > [ 20.536796] raw: 0000000000000000 0020004100000000 ffffffff00000001 0000000000000000 > [ 20.536797] page dumped because: has_unmovable_pages > [ 20.536814] page:000003d0823b0000 count:1 mapcount:0 mapping:0000000000000000 index:0x0 > [ 20.536815] flags: 0x7fffe0000000000() > [ 20.536817] raw: 07fffe0000000000 0000000000000100 0000000000000200 0000000000000000 > [ 20.536818] raw: 0000000000000000 0000000000000000 ffffffff00000001 0000000000000000 > > bisect points to b323c049a999 ("mm, memory_hotplug: be more verbose for memory offline failures") > which is the first commit with which the messages appear. I would bet this is CMA allocator. How much is tons? Maybe we want a rate limit or the other user is not really interested in them at all? -- Michal Hocko SUSE Labs