My NFS server hangs when I get filesystem full/over quota errors.

Solaris 2.4 has a combination of problems that make running with
quotas of or with near-full disks almost impossible. The problems
include writing message to /dev/console, which requires switching
of interrupts and make the machine appear dead, clients caching
upto 2MB of failed writes and retrying them, hammering the server
to death.

Fix: kernel patch 101945-32 (sparc)/101946-29 (x86) or later.
Needs to be applied on clients as well as servers.

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