[Pkg-sysvinit-devel] Bug#499796: Bug#499796: initscripts: rootfs over nfs hangs at reboot

[Henrique de Moraes Holschuh]

On Thu, 14 Apr 2011, Bastian Blywis wrote:
> When /etc/init.d/reboot is run and "reboot -d -f -i" called, in about
> 2-4% of the cases, the system will deadlock because the network
> interfaces are shut down but the kernel still wants to read/write
> something on the nfs export. The message "nfs server not responding" is
> shown.
> 
> Solutions:
> 1) remove the "-i" from the init script
> 2) move the parameters to /etc/default/reboot

Which can change wake-over-lan behaviour on various NICs, so it is not
something we can do lightly.

Although documenting this is a damn good idea.

Really, all disk activity is supposed to be quiesced at this point, and
everything is to be re-mounted read-only, so NFS should not need to do
anything it cannot just give up on doing.  Maybe that's where the real bug
lies?

Can you track down what is still mounted read-write at this point on your
root-over-NFS boxes?  Use /proc/mounts for this.

-- 
  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh