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Date: Sun, 9 Sep 2007 12:00:42 +0200
From: Peter Schuller <peter.schuller@infidyne.com>
To: Kris Kennaway <kris@FreeBSD.org>
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Cc: Simun Mikecin <numisemis@yahoo.com>, freebsd-fs@freebsd.org,
	freebsd-current@freebsd.org
Subject: Re: Swapping on ZFS - stability issue
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[kris]
> Please follow the directions in the developers handbook chapter on kernel=
=20
> 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.

[pjd]
> 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,

--=20
/ Peter Schuller

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