linux-kernel - Re: NFS woes again

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Message-ID: <dda83e780708282252s759a0b85o6562393bd9fca54f@mail.gmail.com>
Date:	Tue, 28 Aug 2007 22:52:27 -0700
From:	"Bret Towe" <magnade@...il.com>
To:	"Trond Myklebust" <trond.myklebust@....uio.no>
Cc:	"Florin Iucha" <florin@...ha.net>,
	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
	"Michal Piotrowski" <michal.k.k.piotrowski@...il.com>
Subject: Re: NFS woes again

On 8/28/07, Trond Myklebust <trond.myklebust@....uio.no> wrote:
> On Mon, 2007-08-27 at 20:35 -0500, Florin Iucha wrote:
> > On Mon, Aug 27, 2007 at 06:19:29PM -0700, Bret Towe wrote:
> > > On 8/27/07, Trond Myklebust <trond.myklebust@....uio.no> wrote:
> > > > > > this sounds alot like the post i did yesterday titled 'nfs4 hang regression'
> > > > > > i tracked it down to commit 3d39c691ff486142dd9aaeac12f553f4476b7a6
> > > > >
> > > > > Yes, it certainly does -- all the symptoms match!
> > > >
> > > > Could you and Bret please check if the attached patch fixes the hang?
> > >
> > > no good for me still hangs after ~30minutes
> >
> > I just booted into the new kernel
> > (3d39c691ff486142dd9aaeac12f553f4476b7a6 + Trond's patch) and it hangs
> > in 10-15 minutes.
> >
> > Process traces available at http://iucha.net/nfs/23-rc2-nfs-fix-1/kernel.log.gz
> >
> > Regards,
> > florin
>
> Doh! I see the problem: cancel_delayed_work_sync() shouldn't ever be
> called recursively.
>
> The following patch should be correct. Please just discard the previous
> one...
>
> Trond
>

uptime of 3 hours and keyboard is still working fine
I'll hopefully get to test this on the mini tomorrow for at least 3 hours also

>
> ---------- Forwarded message ----------
> From: Trond Myklebust <Trond.Myklebust@...app.com>
> To:
> Date: Mon, 27 Aug 2007 09:14:56 -0400
> Subject: No Subject
> Doh! We can't use cancel_delayed_work_sync because we may have been called
> from an unmount that was being performed by nfs_automount_task.
>
> Signed-off-by: Trond Myklebust <Trond.Myklebust@...app.com>
> ---
>
>  fs/nfs/namespace.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c
> index aea76d0..acfc56f 100644
> --- a/fs/nfs/namespace.c
> +++ b/fs/nfs/namespace.c
> @@ -176,7 +176,7 @@ static void nfs_expire_automounts(struct work_struct *work)
>  void nfs_release_automount_timer(void)
>  {
>         if (list_empty(&nfs_automount_list))
> -               cancel_delayed_work_sync(&nfs_automount_task);
> +               cancel_delayed_work(&nfs_automount_task);
>  }
>
>  /*
>
>
-
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