Comment 8 for bug 769927

I can support that observation. It doesn't matter if you put heavy load on the nfs mounts. All that matters is that the nfs mounts are mounted via autofs and that you have a timeout to get the system automatically unmounting the shares. That's where the crash happens actually. Here I have in fact increased the timeout to 3600 seconds and the problem improves because the automounter is not frequently unmounting the share again. Indeed I have moved some of our automounted shares to use /etc/fstab instead and have them permanently mounted. Since then the crashes are very very rare and just happens for our /net/HOST shares. Please also note that it doesn't matter if the share is an nfs3 or nfs4 mount. All that is required is to have autofs mounting the NFS share and having it automatically unmounting it.