From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1749667AbXDKGx4 (ORCPT ); Wed, 11 Apr 2007 02:53:56 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750708AbXDKGxz (ORCPT ); Wed, 11 Apr 2007 02:53:55 -0400 Received: from ug-out-1314.google.com ([66.249.92.173]:43287 "EHLO ug-out-1314.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1749667AbXDKGxy (ORCPT ); Wed, 11 Apr 2007 02:53:54 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:sender:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references:x-google-sender-auth; b=eyCMIQ2kb64WU2ApnSSA3XX7zhsvvupwNhZmGJwXkInYMQy2SjjCV7dFqZDmz2z1wKOHjZ/hTCHUwPwrGy/gKau4CZ+/zN4V4EkWnQ8bAJH1lVCU2NDEr0Cm2/FSTP5KjPXhlg4XwnUd6bErcNnQ/mtsCREIfWi0VmtbXZR49x8= Message-ID: <84144f020704102353r7dcc3538u2e34237d3496630e@mail.gmail.com> Date: Wed, 11 Apr 2007 09:53:53 +0300 From: "Pekka Enberg" To: "Zhao Forrest" Subject: Re: Why kmem_cache_free occupy CPU for more than 10 seconds? Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: X-Google-Sender-Auth: 068de678d70b6fea Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On 4/11/07, Zhao Forrest wrote: > We're using RHEL5 with kernel version 2.6.18-8.el5. > When doing a stress test on raw device for about 3-4 hours, we found > the soft lockup message in dmesg. > I know we're not reporting the bug on the latest kernel, but does any > expert know if this is the known issue in old kernel? Or why > kmem_cache_free occupy CPU for more than 10 seconds? Sounds like slab corruption. CONFIG_DEBUG_SLAB should tell you more.