From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qe0-f50.google.com (mail-qe0-f50.google.com [209.85.128.50]) by kanga.kvack.org (Postfix) with ESMTP id 61E236B0035 for ; Tue, 17 Dec 2013 17:53:54 -0500 (EST) Received: by mail-qe0-f50.google.com with SMTP id 1so5793844qec.23 for ; Tue, 17 Dec 2013 14:53:54 -0800 (PST) Received: from aserp1040.oracle.com (aserp1040.oracle.com. [141.146.126.69]) by mx.google.com with ESMTPS id l3si15797414qac.30.2013.12.17.14.53.53 for (version=TLSv1 cipher=RC4-SHA bits=128/128); Tue, 17 Dec 2013 14:53:53 -0800 (PST) Message-ID: <52B0D5F9.5030208@oracle.com> Date: Tue, 17 Dec 2013 17:53:45 -0500 From: Sasha Levin MIME-Version: 1.0 Subject: Re: [PATCH 10/18] mm: numa: Avoid unnecessary disruption of NUMA hinting during migration References: <1386690695-27380-1-git-send-email-mgorman@suse.de> <1386690695-27380-11-git-send-email-mgorman@suse.de> In-Reply-To: <1386690695-27380-11-git-send-email-mgorman@suse.de> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Mel Gorman , Andrew Morton Cc: Alex Thorlton , Rik van Riel , Linux-MM , LKML Hi Mel, On 12/10/2013 10:51 AM, Mel Gorman wrote: > + > + /* mmap_sem prevents this happening but warn if that changes */ > + WARN_ON(pmd_trans_migrating(pmd)); > + I seem to be hitting this warning with latest -next kernel: [ 1704.594807] WARNING: CPU: 28 PID: 35287 at mm/huge_memory.c:887 copy_huge_pmd+0x145/ 0x3a0() [ 1704.597258] Modules linked in: [ 1704.597844] CPU: 28 PID: 35287 Comm: trinity-main Tainted: G W 3.13.0-rc4- next-20131217-sasha-00013-ga878504-dirty #4149 [ 1704.599924] 0000000000000377e delta! pid slot 27 [36258]: old:2 now:537927697 diff: 537927695 ffff8803593ddb90 ffffffff8439501c ffffffff854722c1 [ 1704.604846] 0000000000000000 ffff8803593ddbd0 ffffffff8112f8ac ffff8803593ddbe0 [ 1704.606391] ffff88034bc137f0 ffff880e41677000 8000000b47c009e4 ffff88034a638000 [ 1704.608008] Call Trace: [ 1704.608511] [] dump_stack+0x52/0x7f [ 1704.609699] [] warn_slowpath_common+0x8c/0xc0 [ 1704.612617] [] warn_slowpath_null+0x1a/0x20 [ 1704.614043] [] copy_huge_pmd+0x145/0x3a0 [ 1704.615587] [] copy_page_range+0x3f2/0x560 [ 1704.616869] [] ? rwsem_wake+0x51/0x70 [ 1704.617942] [] dup_mmap+0x2c9/0x3d0 [ 1704.619146] [] dup_mm+0xad/0x150 [ 1704.620051] [] copy_process+0xa68/0x12e0 [ 1704.622976] [] ? __lock_release+0x1da/0x1f0 [ 1704.624234] [] do_fork+0x96/0x270 [ 1704.624975] [] ? context_tracking_user_exit+0x195/0x1d0 [ 1704.626427] [] ? trace_hardirqs_on+0xd/0x10 [ 1704.627681] [] SyS_clone+0x16/0x20 [ 1704.628833] [] stub_clone+0x69/0x90 [ 1704.629672] [] ? tracesys+0xdd/0xe2 Thanks, Sasha -- 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