From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail143.messagelabs.com (mail143.messagelabs.com [216.82.254.35]) by kanga.kvack.org (Postfix) with SMTP id 79A5A90014E for ; Mon, 1 Aug 2011 02:57:11 -0400 (EDT) Subject: Re: [patch]mm: fix a memcg warning From: Shaohua Li In-Reply-To: <20110801153700.e6f1c9b9.kamezawa.hiroyu@jp.fujitsu.com> References: <1312180878.15392.427.camel@sli10-conroe> <20110801153700.e6f1c9b9.kamezawa.hiroyu@jp.fujitsu.com> Content-Type: text/plain; charset="UTF-8" Date: Mon, 01 Aug 2011 14:57:08 +0800 Message-ID: <1312181828.15392.428.camel@sli10-conroe> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: KAMEZAWA Hiroyuki Cc: Andrew Morton , linux-mm On Mon, 2011-08-01 at 14:37 +0800, KAMEZAWA Hiroyuki wrote: > On Mon, 01 Aug 2011 14:41:18 +0800 > Shaohua Li wrote: > > > I get below warning: > > BUG: using smp_processor_id() in preemptible [00000000] code: bash/739 > > caller is drain_local_stock+0x1a/0x55 > > Pid: 739, comm: bash Tainted: G W 3.0.0+ #255 > > Call Trace: > > [] debug_smp_processor_id+0xc2/0xdc > > [] drain_local_stock+0x1a/0x55 > > [] drain_all_stock+0x98/0x13a > > [] mem_cgroup_force_empty+0xa3/0x27a > > [] ? sys_close+0x38/0x138 > > [] ? environ_read+0x1d/0x159 > > [] 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 > > > > drain_local_stock() should be run with preempt disabled. > > > > Signed-off-by: Shaohua Li > > > > Thanks, > Acked-by: KAMEZAWA Hiroyuki > > IIUC, I myself didn't see this warning when I wrote codes. > Do I need to set some CONFIG ? I thought it's CONFIG_DEBUG_PREEMPT=y -- 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