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Bug#599823: linux-2.6: XEN and NFS causes duplicate filenames with large directories

Package: linux-2.6
Severity: important
Tags: upstream

There apears to be an allusive bug that makes it very difficult to track down. 

So far I have found the following details:

1. Happens only on Xen DomU
2. Duplicate filenames are given when doing an "ls"
3. Trigger happens when a rename (mv) happens on a directory with a large number of files.
4. Does not matter which machine does the rename/mv (Any box connected to the NFS) the duplicate filenames still show up under DomU
5. Does not appear to happen to directories with a limited number of files. I have one directory with > 9k files which this does happen on (mail directory)
6. To clear the issue, you have to either rename the file back to the original, or reboot the DomU

A little direction on how to continue diagnosing this issue, or a fix :) would be good. 


-- System Information:
Debian Release: squeeze/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: i386 (i686)

Kernel: Linux 2.6.32-5-686-bigmem (SMP w/1 CPU core)
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)
Shell: /bin/sh linked to /bin/dash

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