Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751159AbVIVTX7 (ORCPT ); Thu, 22 Sep 2005 15:23:59 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751162AbVIVTX7 (ORCPT ); Thu, 22 Sep 2005 15:23:59 -0400 Received: from e33.co.us.ibm.com ([32.97.110.151]:50887 "EHLO e33.co.us.ibm.com") by vger.kernel.org with ESMTP id S1751159AbVIVTX7 (ORCPT ); Thu, 22 Sep 2005 15:23:59 -0400 Date: Fri, 23 Sep 2005 00:48:05 +0530 From: Dipankar Sarma To: Christopher Friesen Cc: Al Viro , Roland Dreier , Sonny Rao , linux-kernel@vger.kernel.org, "Theodore Ts'o" , bharata@in.ibm.com, trond.myklebust@fys.uio.no Subject: Re: dentry_cache using up all my zone normal memory -- also seen on 2.6.14-rc2 Message-ID: <20050922191805.GB4729@in.ibm.com> Reply-To: dipankar@in.ibm.com References: <4331C9B2.5070801@nortel.com> <20050921210019.GF4569@in.ibm.com> <4331CFAD.6020805@nortel.com> <52ll1qkrii.fsf@cisco.com> <20050922031136.GE7992@ftp.linux.org.uk> <43322AE6.1080408@nortel.com> <20050922041733.GF7992@ftp.linux.org.uk> <4332CAEA.1010509@nortel.com> <20050922182719.GA4729@in.ibm.com> <4332FFF5.5060207@nortel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4332FFF5.5060207@nortel.com> User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1059 Lines: 27 On Thu, Sep 22, 2005 at 01:03:17PM -0600, Christopher Friesen wrote: > Dipankar Sarma wrote: > > >This can happen if a task runs for too long inside the kernel > >holding up context switches or usermode code running on that > >cpu. The fact that RCU grace period eventually happens > >and the dentries are freed means that something intermittently > >holds up RCU. Is this 2.6.10 vanilla or does it have other > >patches in there ? > > The 2.6.10 was modified. All the results with the dcache debugging > patch applied were from vanilla 2.6.14-rc2. > > It's perfectly repeatable as well...every single time I run "rename14" > the OOM killer kicks in. Can you look at that each cpu is running (backtrace) using sysrq ? That may tell us what is holding up RCU. I will look at it myself later. Thanks Dipankar - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/