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
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