Upgrade to 2.6.24 breaks NFS service

[Nix]

I upgraded from 2.6.23.10 to 2.6.24.2 yesterday, and found NFS service
failing.

To be specific, all locks were blocking forever, with an endless flood
of

Feb 12 22:53:10 loki notice: kernel: statd: server localhost not responding, timed out
Feb 12 22:53:10 loki notice: kernel: lockd: cannot monitor esperi
Feb 12 22:53:45 loki notice: kernel: statd: server localhost not responding, timed out
Feb 12 22:53:45 loki notice: kernel: lockd: cannot monitor esperi
Feb 12 22:54:20 loki notice: kernel: statd: server localhost not responding, timed out
Feb 12 22:54:20 loki notice: kernel: lockd: cannot monitor esperi
Feb 12 22:54:55 loki notice: kernel: statd: server localhost not responding, timed out
Feb 12 22:54:55 loki notice: kernel: lockd: cannot monitor esperi
Feb 12 22:55:20 esperi notice: kernel: lockd: server loki.wkstn.nix not responding, still trying

(esperi is a UML instance on the same machine, connected via a bridged
TUN/TAP interface: the bridge, and network service to esperi and to the
rest of the local net across that bridge, was fine.)

I'm currently using NFSv3 atop nfs-utils 1.1.0.33-gdd08789, with daemons
being started in the suggested order (portmap, mountd, statd
--no-notify, nfsd). This evening I'm going to try to upgrade to
nfs-utils HEAD and see if this continues.

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