Re: [opensuse] nfs_update_inode: inode X mode changed, Y to Z

From: Adam Schrotenboer
Date: Wed Mar 12 2008 - 14:16:26 EST

Trond Myklebust wrote:
On Wed, 2008-03-12 at 10:55 -0700, Adam Schrotenboer wrote:
Another excerpt from last night.

Mar 12 00:53:16 wanda kernel: nfs: server 192.168.1.27 not responding, still trying
Mar 12 00:53:18 wanda kernel: nfs: server 192.168.1.27 OK
Mar 12 00:54:29 wanda kernel: nfs_update_inode: inode 1075049148 mode changed, 0040755 to 0100644

Hang on. That does not look like an XID collision problem...

That code path basically means that the fileids/inode numbers match,
which would not be the case if we were talking about an XID collision
causing the reply cache to replay an old request...

That message rather symptomatic of a filehandle reuse problem. In other
words a NFS filehandle appears to be reused to label a regular file
after it has been used for a directory with the same fileid/inode
number. That is a definite server bug.

Are you sure that you are using the regular kernel nfs server?

Quite. OpenSuSE 10.2 stock unmodified kernel.

dolphin:~ # uname -a
Linux dolphin 2.6.18.2-34-default #1 SMP Mon Nov 27 11:46:27 UTC 2006 x86_64 x86_64 x86_64 GNU/Linux

dolphin:~ # top -bn1 |grep nfsd


PID PPID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
3916 1 root 15 0 0 0 0 S 0 0.0 3:04.42 nfsd
3942 1 root 15 0 0 0 0 S 0 0.0 3:11.88 nfsd
(there's quite a bit more of these threads than this (32), but they all look the same in top or ps)


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