In message <200004301856.UAA29794@rumolt.teuto.de>, Martin Husemann writes:
>I have some machines running rock solid with it on all filesystems, but
>one particular machine locks up regulary when I enable it (last tried with
>current about one month ago).

I don't know if this is related at all, but on BSD/OS, we've had some systems
which need more kernel memory.  With the old crufty VM stuff, this is
"options KMEMSIZE", I don't know how to do a corresponding tweak with UVM.

There's a known potential deadlock where space would need to be allocated to
begin doing writes, but there's no space available.

-s