Cyril Brulebois:
> Please find attached a tarball with the output of df, mount,
> cat /proc/mounts, as well as the contents of /var/log/messages once
> I've run "apt-get update", then pressed the requested magic keys.

Thanks.
But unfortunately, those stacktraces show some bogus
information and I could not get where a bug is. Probably it is due to
your kernel configuration or compile option.
I won't ask you to recompile your kernel, instead I'd want you to try
the following steps to debug aufs.
- enable CONFIG_AUFS_DEBUG and recompile the aufs module
- setup your syslog to receive kernel debug messages. for example, 
  "echo 8 > /proc/sys/kernel/printk". Details will depends upon your
  environment.
- just before "apt-get update", execute "echo 1 > /sys/fs/aufs/debug"
- just after the process stopped, execute "echo 0 > /sys/fs/aufs/debug"
- and show me the debug log.

In other words, during the value of /sys/fs/aufs/debug is not 0, aufs
produces many debug messages. In your case, other processes will produce
debug messages too. So the log size may be large.


Junjiro Okajima

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