From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail203.messagelabs.com (mail203.messagelabs.com [216.82.254.243]) by kanga.kvack.org (Postfix) with ESMTP id 74BF790014E for ; Mon, 1 Aug 2011 02:55:46 -0400 (EDT) Received: from m4.gw.fujitsu.co.jp (unknown [10.0.50.74]) by fgwmail5.fujitsu.co.jp (Postfix) with ESMTP id 15B083EE0BD for ; Mon, 1 Aug 2011 15:55:44 +0900 (JST) Received: from smail (m4 [127.0.0.1]) by outgoing.m4.gw.fujitsu.co.jp (Postfix) with ESMTP id F073F45DD70 for ; Mon, 1 Aug 2011 15:55:43 +0900 (JST) Received: from s4.gw.fujitsu.co.jp (s4.gw.fujitsu.co.jp [10.0.50.94]) by m4.gw.fujitsu.co.jp (Postfix) with ESMTP id D7AED45DE4F for ; Mon, 1 Aug 2011 15:55:43 +0900 (JST) Received: from s4.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s4.gw.fujitsu.co.jp (Postfix) with ESMTP id CA74D1DB8040 for ; Mon, 1 Aug 2011 15:55:43 +0900 (JST) Received: from m106.s.css.fujitsu.com (m106.s.css.fujitsu.com [10.240.81.146]) by s4.gw.fujitsu.co.jp (Postfix) with ESMTP id 9871D1DB803B for ; Mon, 1 Aug 2011 15:55:43 +0900 (JST) Date: Mon, 1 Aug 2011 15:48:27 +0900 From: KAMEZAWA Hiroyuki Subject: Re: [patch]mm: fix a vmscan warning Message-Id: <20110801154827.9b56c752.kamezawa.hiroyu@jp.fujitsu.com> In-Reply-To: <1312180877.15392.426.camel@sli10-conroe> References: <1312180877.15392.426.camel@sli10-conroe> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Shaohua Li Cc: Andrew Morton , linux-mm On Mon, 01 Aug 2011 14:41:17 +0800 Shaohua Li wrote: > I get below warnning: > BUG: using smp_processor_id() in preemptible [00000000] code: bash/746 > caller is native_sched_clock+0x37/0x6e > Pid: 746, comm: bash Tainted: G W 3.0.0+ #254 > Call Trace: > [] debug_smp_processor_id+0xc2/0xdc > [] native_sched_clock+0x37/0x6e > [] try_to_free_mem_cgroup_pages+0x7d/0x270 > [] mem_cgroup_force_empty+0x24b/0x27a > [] ? sys_close+0x38/0x138 > [] ? sys_close+0x38/0x138 > [] mem_cgroup_force_empty_write+0x17/0x19 > [] cgroup_file_write+0xa8/0xba > [] vfs_write+0xb3/0x138 > [] sys_write+0x4a/0x71 > [] ? sys_close+0xf0/0x138 > [] system_call_fastpath+0x16/0x1b > > sched_clock() can't be used with preempt enabled. And we don't > need fast approach to get clock here, so let's use ktime API. > > Signed-off-by: Shaohua Li Tested, thanks!. Acked-by: KAMEZAWA Hiroyuki -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org