From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751509AbaG1SzX (ORCPT ); Mon, 28 Jul 2014 14:55:23 -0400 Received: from qmta04.emeryville.ca.mail.comcast.net ([76.96.30.40]:52301 "EHLO qmta04.emeryville.ca.mail.comcast.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750825AbaG1SzV (ORCPT ); Mon, 28 Jul 2014 14:55:21 -0400 Date: Mon, 28 Jul 2014 13:55:17 -0500 (CDT) From: Christoph Lameter To: Sasha Levin cc: akpm@linux-foundation.org, Gilad Ben-Yossef , Thomas Gleixner , Tejun Heo , John Stultz , Mike Frysinger , Minchan Kim , Hakan Akkan , Max Krasnyansky , Frederic Weisbecker , "Paul E. McKenney" , linux-kernel@vger.kernel.org, linux-mm@kvack.org, hughd@google.com, viresh.kumar@linaro.org, hpa@zytor.com, mingo@kernel.org, peterz@infradead.org Subject: Re: vmstat: On demand vmstat workers V8 In-Reply-To: <53D31101.8000107@oracle.com> Message-ID: References: <53D31101.8000107@oracle.com> Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 25 Jul 2014, Sasha Levin wrote: > This patch doesn't interact well with my fuzzing setup. I'm seeing > the following: > > [ 490.446927] BUG: using __this_cpu_read() in preemptible [00000000] code: kworker/16:1/7368 > [ 490.447909] caller is __this_cpu_preempt_check+0x13/0x20 __this_cpu_read() from vmstat_update is only called from a kworker that is bound to a single cpu. A false positive? From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qg0-f45.google.com (mail-qg0-f45.google.com [209.85.192.45]) by kanga.kvack.org (Postfix) with ESMTP id 0426C6B0036 for ; Mon, 28 Jul 2014 14:55:21 -0400 (EDT) Received: by mail-qg0-f45.google.com with SMTP id f51so9007038qge.32 for ; Mon, 28 Jul 2014 11:55:21 -0700 (PDT) Received: from qmta12.emeryville.ca.mail.comcast.net (qmta12.emeryville.ca.mail.comcast.net. [2001:558:fe2d:44:76:96:27:227]) by mx.google.com with ESMTPS id 34si33562832qgq.78.2014.07.28.11.55.20 for (version=TLSv1 cipher=RC4-SHA bits=128/128); Mon, 28 Jul 2014 11:55:21 -0700 (PDT) Date: Mon, 28 Jul 2014 13:55:17 -0500 (CDT) From: Christoph Lameter Subject: Re: vmstat: On demand vmstat workers V8 In-Reply-To: <53D31101.8000107@oracle.com> Message-ID: References: <53D31101.8000107@oracle.com> Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org List-ID: To: Sasha Levin Cc: akpm@linux-foundation.org, Gilad Ben-Yossef , Thomas Gleixner , Tejun Heo , John Stultz , Mike Frysinger , Minchan Kim , Hakan Akkan , Max Krasnyansky , Frederic Weisbecker , "Paul E. McKenney" , linux-kernel@vger.kernel.org, linux-mm@kvack.org, hughd@google.com, viresh.kumar@linaro.org, hpa@zytor.com, mingo@kernel.org, peterz@infradead.org On Fri, 25 Jul 2014, Sasha Levin wrote: > This patch doesn't interact well with my fuzzing setup. I'm seeing > the following: > > [ 490.446927] BUG: using __this_cpu_read() in preemptible [00000000] code: kworker/16:1/7368 > [ 490.447909] caller is __this_cpu_preempt_check+0x13/0x20 __this_cpu_read() from vmstat_update is only called from a kworker that is bound to a single cpu. A false positive? -- 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