Thomas Nikolajsen <thomas.nikolajsen@mail.dk> added the comment:
I did some more tests: issue not seen w/ UP kernel (GENERIC) on client.
Other things which didn't help:
- disable swapcache(8)
- using UDP for nfs mount
All builds are '-j 4' (or '-j 3'; actually '-j NCPU+2').
I also had a panic while doing 'reboot' on client during a nfs stall:
Fatal trap 12: page fault while in kernel mode
...
db> trace
nfs_removerpc(..)
...
(i jotted down more detail, please respond if they are needed)
On most occasions doing 'reboot' during nfs stall just stalled.
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<http://bugs.dragonflybsd.org/issue1872>
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