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Message-ID: <20070822202639.GL20946@fieldses.org>
Date: Wed, 22 Aug 2007 16:26:39 -0400
From: "J. Bruce Fields" <bfields@...ldses.org>
To: "Morrison, Tom" <tmorrison@...irix.com>
Cc: nfs@...ts.sourceforge.net, linux-kernel@...r.kernel.org,
"Rushton, Matt" <Mrushton@...irix.com>
Subject: Re: NFS/RPC Hangs after updating time...
On Wed, Aug 22, 2007 at 02:37:22PM -0400, Morrison, Tom wrote:
> I am working with a 2.6.11++ kernel on an embedded
> server platform that is NFS serving Linux rootfs
> for other embedded NFS Client boards.
>
> Everything works fine when the system time on the
> server board is relatively synchronized with the real-time.
>
> It hangs after attempting to update the time from a
> nonsensical time (e.g.: 2 months ago) - the most significant
> part of it is that it only hangs IFF it has started
> serving its NFS client boards before I attempt to
> update the time.
>
>
> The most significant output (when turning on
> RPC debugging) is from:
>
> linux/net/sunrpc/cache.c (cache_check) - line 90:
>
> >> Want update, refage=1800, age=4288285
>
> It continually loops through this method - and the cache
> never gets updated...even thought with some additional
> sleuthing (aka: additional debug printks - it thinks
> that there is an cache update pending).
Can you reproduce the problem with the current kernel? (Say 2.6.22 or
later?)
--b.
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