From: Trond Myklebust <Trond.Myklebust@netapp.com>
To: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Cc: linux-kernel@vger.kernel.org
Subject: Re: nfs: desynchronized value of nfs_i.ncommit.
Date: Tue, 17 Apr 2007 18:44:30 -0400 [thread overview]
Message-ID: <1176849870.6455.3.camel@heimdal.trondhjem.org> (raw)
In-Reply-To: <87hcrfaqam.fsf@duaron.myhome.or.jp>
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
next prev parent reply other threads:[~2007-04-17 22:44 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20070416125905.GA2769@iucha.net>
[not found] ` <1176736734.6761.45.camel@heimdal.trondhjem.org>
[not found] ` <Pine.LNX.4.64.0704160904560.5473@woody.linux-foundation.org>
[not found] ` <1176740307.6761.56.camel@heimdal.trondhjem.org>
[not found] ` <1176741408.6761.62.camel@heimdal.trondhjem.org>
[not found] ` <1176792399.3035.30.camel@twins>
[not found] ` <1176796503.3035.33.camel@twins>
2007-04-17 17:01 ` OGAWA Hirofumi
2007-04-17 22:44 ` Trond Myklebust [this message]
2007-04-18 1:19 ` [PATCH 0/4] 2.6.21-rc7 NFS writes: fix a series of issues Trond Myklebust
2007-04-18 1:29 ` [PATCH 1/4] NFS: clean up the unstable write code Trond Myklebust
2007-04-18 1:29 ` [PATCH 2/4] NFS: Don't clear PG_writeback until after we've processed unstable writes Trond Myklebust
2007-04-18 1:29 ` [PATCH 3/4] NFS: Fix the 'desynchronized value of nfs_i.ncommit' error Trond Myklebust
2007-04-18 1:29 ` [PATCH 4/4] NFS: Fix race in nfs_set_page_dirty Trond Myklebust
2007-04-18 2:58 ` [PATCH 0/4] 2.6.21-rc7 NFS writes: fix a series of issues Andrew Morton
2007-04-18 3:06 ` Trond Myklebust
2007-04-18 3:30 ` Florin Iucha
2007-04-18 3:54 ` Trond Myklebust
2007-04-18 4:07 ` Florin Iucha
2007-04-18 4:13 ` Andrew Morton
2007-04-18 4:30 ` Florin Iucha
2007-04-18 5:14 ` Linus Torvalds
2007-04-18 5:26 ` Florin Iucha
2007-04-18 5:37 ` Andrew Morton
2007-04-18 12:38 ` Florin Iucha
2007-04-18 13:15 ` Trond Myklebust
2007-04-18 13:42 ` Florin Iucha
2007-04-18 14:11 ` Trond Myklebust
2007-04-18 14:17 ` Florin Iucha
2007-04-18 14:19 ` Trond Myklebust
2007-04-19 1:52 ` Florin Iucha
2007-04-19 2:45 ` Trond Myklebust
2007-04-19 4:38 ` Success! Was: " Florin Iucha
2007-04-19 15:12 ` Chuck Lever
2007-04-19 15:17 ` Trond Myklebust
2007-04-19 15:50 ` Florin Iucha
2007-04-19 16:09 ` Trond Myklebust
2007-04-19 19:58 ` Failure! " Florin Iucha
2007-04-19 21:30 ` Trond Myklebust
2007-04-19 21:49 ` Florin Iucha
2007-04-20 13:30 ` Success! Was: " Florin Iucha
2007-04-20 13:37 ` Trond Myklebust
2007-04-20 13:51 ` Florin Iucha
2007-04-18 14:14 ` Florin Iucha
2007-04-29 19:41 ` Rogier Wolff
2007-04-29 20:09 ` Peter Zijlstra
2007-04-18 11:38 ` Trond Myklebust
2007-04-18 9:54 ` OGAWA Hirofumi
2007-04-18 8:19 ` Peter Zijlstra
2007-04-18 16:41 ` Peter Zijlstra
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