On 09/05/2009 04:31 AM, Pacho Ramos wrote: > I suffer the following problem with nfs since a lot of time, now, I am > using nfs-utils-1.2.0, but older versions were affected too. > > When I write a file on a mounted nfs filesystem and server goes down, I > am unable to umount it even with "-f" option, it simply hangs. On the > other hand, if no file was written (for example, it was simply read) > there is no problem and "umount -f" works as expected. I believe 'umount -f' waits for all the async or sync (I can't remember) RPC tasks to complete before returning... That's the reason for the hang. > > Seems that I need to run "umount -l" for being able to unmount it, even > when I expected that "-f" should be enough. Hopefully you will be rebooting soon since kernel structures (ala the super block) are not cleaned up with 'umount -l'. Which could make the system somewhat unstable. > > Is this the proper behavior or something is going wrong? Its the known behaviour... whether its correct or not is up to interpretation... ;-) Meaning, 'umount -f' probably should not hang waiting for I/O to finish, but error-ing on the "lets do everything we can not to corrupt data" is not a bad stand either... steved. -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
