From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1161403AbXDQWoe (ORCPT ); Tue, 17 Apr 2007 18:44:34 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1161406AbXDQWoe (ORCPT ); Tue, 17 Apr 2007 18:44:34 -0400 Received: from mx2.netapp.com ([216.240.18.37]:7599 "EHLO mx2.netapp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1161403AbXDQWod (ORCPT ); Tue, 17 Apr 2007 18:44:33 -0400 X-IronPort-AV: i="4.14,420,1170662400"; d="scan'208"; a="52078449:sNHT14927976" Subject: Re: nfs: desynchronized value of nfs_i.ncommit. From: Trond Myklebust To: OGAWA Hirofumi Cc: linux-kernel@vger.kernel.org In-Reply-To: <87hcrfaqam.fsf@duaron.myhome.or.jp> References: <87hcrfaqam.fsf@duaron.myhome.or.jp> Content-Type: text/plain Content-Transfer-Encoding: 7bit Organization: Network Appliance Inc Date: Tue, 17 Apr 2007 18:44:30 -0400 Message-Id: <1176849870.6455.3.camel@heimdal.trondhjem.org> Mime-Version: 1.0 X-Mailer: Evolution 2.10.1 X-OriginalArrivalTime: 17 Apr 2007 22:44:37.0419 (UTC) FILETIME=[FA3827B0:01C78141] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 2007-04-18 at 02:01 +0900, OGAWA Hirofumi wrote: > Hi, > > I've got the following message today. Probably, it happened on heavy load. > > NFS: desynchronized value of nfs_i.ncommit. > NFS: desynchronized value of nfs_i.ncommit. > NFS: desynchronized value of nfs_i.ncommit. > NFS: desynchronized value of nfs_i.ncommit. > NFS: desynchronized value of nfs_i.ncommit. > NFS: desynchronized value of nfs_i.ncommit. > NFS: desynchronized value of nfs_i.ncommit. > [...] > > Any idea? Thanks. It is a known issue that is due to nfs_writepage() 'stealing' requests from the commit list. The most dangerous consequence is that it screws up the NR_UNSTABLE_NFS page accounting... I'm working on a fix, and will post it to lkml as soon as I'm happy with tests. Cheers Trond