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Date: Tue, 02 Dec 2008 11:03:40 -0500
To: Kostik Belousov <kostikbel@gmail.com>
From: Mike Tancsa <mike@sentex.net>
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Cc: freebsd-stable@freebsd.org
Subject: Re: repeatable crash on RELENG7
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At 09:20 AM 12/2/2008, Kostik Belousov wrote:
>On Tue, Dec 02, 2008 at 09:12:54AM -0500, Mike Tancsa wrote:
> > At 08:38 AM 12/2/2008, Kostik Belousov wrote:
> > >>
> > >> mdconfig -a -t malloc -s 1800M
> > >You cannot have ~ 2Gb of kernel memory allocated for md, at least not on
> > >i386.
> >
> > Thanks,  how do I find out what the limit is on a machine ? Is it
> > vm.kvm_size ?
>
>It is much less, and highly depends on your load, since KVA is used for all
>kind of allocations made by kernel. I think either md(4) or mdconfig(8) have
>a warning about malloc backing for md.

Thanks!  A warning might be helpful to prevent such foot shooting :)

         ---Mike