[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <1199998294.13775.8.camel@heimdal.trondhjem.org>
Date: Thu, 10 Jan 2008 15:51:34 -0500
From: Trond Myklebust <Trond.Myklebust@...app.com>
To: Jeff Garzik <jeff@...zik.org>
Cc: linux-nfs@...r.kernel.org, linux-kernel@...r.kernel.org,
Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: major NFSv4 client regression (-rc7)
On Thu, 2008-01-10 at 15:41 -0500, Jeff Garzik wrote:
> Server: Linux 2.6.24-rc6 (x86-64/Fedora 8)
> Good client: Linux 2.6.24-rc6-ge697789d (x86-64/Fedora 7)
> Bad client: Linux 2.6.24-rc7-gfd0b45df (x86-64/Fedora 7)
> Situation: home dir via NFS
>
> My home setup is a standard homedir-over-NFS setup, using NFSv4 on both
> client and server. I just rebooted into the latest upstream kernel, and
> I am getting NFS client hangs all over the place:
>
> [jgarzik@...e firefox]$ cat profiles.ini
>
> hangs here, for 15 minutes so far and counting...
> ('core' is the client machine)
>
> and I first noticed this when firefox and thunderbird were hanging, when
> I tried to start them after rebooting into the latest kernel. stracing
> firefox yielding a hang in open:
>
> ("/g" is the NFS-mounted volume)
>
> access("/usr/lib64/firefox-2.0.0.10/updates", F_OK) = -1 ENOENT (No such file or directory)
> access("/g/g/.mozilla/firefox", F_OK) = 0
> access("/g/g/.mozilla/firefox", F_OK) = 0
> stat("/g/g/.mozilla/firefox/profiles.ini", {st_mode=S_IFREG|0664, st_size=94, ...}) = 0
> open("/g/g/.mozilla/firefox/profiles.ini", O_RDONLY
>
> hangs here, for 20 minutes so far and counting...
>
> As you can see from the trace, and as I can report simply by being able
> to send this message, SOME file accesses over NFS work just fine.
>
> Accessing the file works when logged into the server, so its not disk
> corruption or something like that.
>
> Neither client nor server have anything interesting in dmesg -- in fact
> nothing in dmesg beyond the normal boot messages have been printed.
>
> Let me know what info I can provide... This is a 100% reproducible
> regression, and this latest NFS client revision has made my local
> NFS-over-homedir setup completely unusable. I am forced to return to
> the known working client (Linux 2.6.24-rc6-ge697789d) just to run basic
> apps.
This looks as if it might be the same issue that was reported as bug
9712 in bugzilla (http://bugzilla.kernel.org/show_bug.cgi?id=9712).
The fix is attached. Please could you confirm that it fixes the hang?
Cheers
Trond
Download attachment "linux-2.6.24-001-fix_locking_deadlock_in_nfs4_lock_prepare.dif" of type "message/rfc822" (1570 bytes)
Powered by blists - more mailing lists