Messages in this thread | | | Subject | Re: intermittent NFS hangs from NetApp | Date | Sun, 27 Feb 2000 20:49:07 +0000 (GMT) | From | Alan Cox <> |
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> When the problem occurs, all processes that touch the mount are > indefinitly hung. Errors in messages show up: > Feb 24 18:08:04 dhp0020 kernel: nfs: server 192.168.0.253 not > responding, still trying > Feb 24 18:08:04 dhp0020 kernel: nfs: server 192.168.0.253 not > responding, still trying
As far as its concerned the netapp isnt talking
> The problem is immediately solved with a simple umount -f; which fails > because of the current processes, but it fixes the hang! When I do > umount -f, all of the waiting processes get a failed read, but they > continue normally.
That suggests a wakeup got missed somewhere. It doesnt fit the netapp not talking. Either the netapp is losing a consistent request or it is the nfs client in the kernel. Both are possible, only doing some network dumps (tcpdump with -l 1514 and asked to decode NFS frames) done when it starts hanging would tell
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