NFS client bug in 2.6.8-2.6.11

[Bernardo Innocenti <bernie@develer.com>]

Hello,

This problem was previously described by Neil Conway.
All relevant information here:

  http://lkml.org/lkml/2005/2/10/97


I still see this very same problem on 2.6.11 vanilla and in
Fedora/RawHide hernels.  It has haunted me for a couple of
months on several Fedora clients.  Strangely, a Gentoo
client isn't affected, but I couldn't investigate further.

When the current directory becomes inaccessible, it remains
so until I cd somewhere else and then cd back to it.
Sometimes I must wait a few seconds before cd succeeds.

Here's a sample session:

 [executing a find / in another shell to trigger the bug]
 beetle:/pub/linux/distro/fedora-devel# ll
 ls: .: No such file or directory
 beetle:/pub/linux/distro/fedora-devel# cd -
 /
 beetle:/# cd -
 bash: cd: /pub/linux/distro/fedora-devel: No such file or directory
 beetle:/#
 [...a few seconds later...]
 beetle:/# cd -
 /pub/linux/distro/fedora-devel


Appears to be a client bug.  The problem only happens
when there's heavy filesystem activity on other
filesystems (local or NFS).

NFS mount options: rw,_netdev,rsize=32768,wsize=32768,hard,intr,proto=udp,addr=10.3.3.1

-- 
  // Bernardo Innocenti - Develer S.r.l., R&D dept.
\X/  http://www.develer.com/