Swapping on ZFS - stability issue

Peter Schuller peter.schuller at infidyne.com
Sun Sep 9 03:00:45 PDT 2007

> Please follow the directions in the developers handbook chapter on kernel 
> debugging to obtain the relevant debugging information.

Apologies. Aside from the first instance, where the machine had sat
there for 12+ hours, I never got any panic message or anything like
that which gives an opportunity for a stacktrace, etc.

> This is a known issue also in OpenSolaris. ZFS needs to allocate memory
> to send I/O request, and when there is no memory, it can't allocate it
> thus can't swap a process out and free it.

Ok, so a known issue. Unless someone tells me otherwise I'll update
the ZFS-on-FreeBSD Wiki pages to warn about this issue (assuming it's
editable by me).

Thank you,

/ Peter Schuller

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