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Date:      Tue, 2 Dec 2008 16:20:45 +0200
From:      Kostik Belousov <kostikbel@gmail.com>
To:        Mike Tancsa <mike@sentex.net>
Cc:        freebsd-stable@freebsd.org
Subject:   Re: repeatable crash on RELENG7
Message-ID:  <20081202142045.GA3045@deviant.kiev.zoral.com.ua>
In-Reply-To: <200812021412.mB2ECsEp004018@lava.sentex.ca>
References:  <200812021319.mB2DJGJx003807@lava.sentex.ca> <20081202133812.GY3045@deviant.kiev.zoral.com.ua> <200812021412.mB2ECsEp004018@lava.sentex.ca>

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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.
>=20
> Thanks,  how do I find out what the limit is on a machine ? Is it=20
> 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.

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