Swapfile on ZFS & Deadlock

[Claus Guttesen]

>     Whilst running out of memory compiling Xorg (scanPCI is a killer) I
> discovered a quick way to deadlock the system:
>
> dd if=/dev/zero of=somefileonzfs bs=something count=something
> mdconfig -a -f something
> swapon /dev/md0
>
> Then do something that needs swap.. instant deadlock. The system is
> still responsive but all disk access become hung.
>
> Known issue? If so is there a way we can warn users/prevent users from
> doing it?

How much swap have you allocated?

-- 
regards
Claus

When lenity and cruelty play for a kingdom,
the gentlest gamester is the soonest winner.

Shakespeare