* NFS hangs in 2.4.27
@ 2004-09-08 12:07 Christoph Pleger
2004-09-09 6:43 ` Willy Tarreau
0 siblings, 1 reply; 2+ messages in thread
From: Christoph Pleger @ 2004-09-08 12:07 UTC (permalink / raw)
To: linux-kernel
Hello,
Since a few days I have great NFS problems on six Linux machines. The
execution of "ps aux" shows that processes are hanging for they are
waiting for the completion of uninterruptable NFS I/O and the system
utilization becomes very high.
The hangs occurred since the installation of Kernel 2.4.27 (used 2.4.26
before), so I guess that Kernel 2.4.27 introduces the problems with NFS.
I am not sure about that, but since I reinstalled the old 2.4.26-Kernel
on one of the six computers, that machine works fine.
Has someone else experienced NFS hangs under 2.4.27 so far?
Kind regards
Christoph Pleger
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: NFS hangs in 2.4.27
2004-09-08 12:07 NFS hangs in 2.4.27 Christoph Pleger
@ 2004-09-09 6:43 ` Willy Tarreau
0 siblings, 0 replies; 2+ messages in thread
From: Willy Tarreau @ 2004-09-09 6:43 UTC (permalink / raw)
To: Christoph Pleger; +Cc: linux-kernel
On Wed, Sep 08, 2004 at 02:07:30PM +0200, Christoph Pleger wrote:
> Hello,
>
> Since a few days I have great NFS problems on six Linux machines. The
> execution of "ps aux" shows that processes are hanging for they are
> waiting for the completion of uninterruptable NFS I/O and the system
> utilization becomes very high.
>
> The hangs occurred since the installation of Kernel 2.4.27 (used 2.4.26
> before), so I guess that Kernel 2.4.27 introduces the problems with NFS.
> I am not sure about that, but since I reinstalled the old 2.4.26-Kernel
> on one of the six computers, that machine works fine.
>
> Has someone else experienced NFS hangs under 2.4.27 so far?
I have seen this only with the preempt patch applied and enabled. But since
the kernel also had lots of other patches applied, I cannot tell that it is
only NFS+preemt alone. It deadlocked on a spinlock() in nfs_sync_page() IIRC.
But no problem so far with preempt disabled.
Regards,
Willy
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2004-09-08 12:07 NFS hangs in 2.4.27 Christoph Pleger
2004-09-09 6:43 ` Willy Tarreau
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