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Date: Sun, 4 Mar 2007 22:59:46 -0500
From: Kris Kennaway <kris@obsecurity.org>
To: Yar Tikhiy <yar@comp.chem.msu.su>
Message-ID: <20070305035945.GA71660@xor.obsecurity.org>
References: <20070227205351.GA72597@ravenloft.kiev.ua>
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Cc: stable@freebsd.org, Alex Kozlov <spam@rm-rf.kiev.ua>,
	Mikhail Teterin <mi+kde@aldan.algebra.com>
Subject: Re: panic: kmem_malloc(16384): kmem_map too small: md-mounted /tmp
	filled up
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On Sun, Mar 04, 2007 at 10:59:46AM +0300, Yar Tikhiy wrote:
> On Tue, Feb 27, 2007 at 04:03:30PM -0500, Mikhail Teterin wrote:
> > On Tuesday 27 February 2007 15:53, Alex Kozlov wrote:
> > =3D > Yes, I switched to swap-backed md already. But the malloc-based v=
ariety is=20
> > =3D > currently the _default_ (see /etc/defaults/rc.conf)...
> > =3D Bad default.
> >=20
> > Filing a PR.
>=20
> Keep in mind that changing the default can break existing setups.
> Such setups are likely to be broken anyway, but...  E.g., if we
> drop the -M flag, it will break systems with tons of RAM but little
> swap using tmpmfs.

How will it break them?  swap backing only touches swap if there is
memory pressure, i.e. precisely the situation in which malloc backing
will panic.

Kris

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