From owner-freebsd-current@FreeBSD.ORG  Mon Oct 29 17:07:43 2007
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Date: Mon, 29 Oct 2007 13:36:58 +0200
From: "Gleb Kozyrev" <gkozyrev@gmail.com>
To: "Kris Kennaway" <kris@freebsd.org>
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Cc: freebsd-current@freebsd.org
Subject: Re: Deadlock, exclusive sx so_rcv_sx, amd64
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On 29/10/2007, Kris Kennaway <kris@freebsd.org> wrote:
> > It now just takes longer until freeze with shpgperproc = 5000 (originally 200).
> >
>
> So how about vm.pmap.pv_entry_max?  Have you obtained the usual
> debugging information (DDB backtraces, etc) when the system freezes?

vm.pmap.pv_entry_max and vm.pmap.shpgperproc turn out to be related
and raising one of them automatically raises the other.

If there's a bug those sysctls won't help, will they?
If there's no bug what values can you suggest?
Defaults are
vm.pmap.pv_entry_max: 1479365
vm.pmap.shpgperproc: 200

Backtraces, etc are provided in this thread.
<http://docs.FreeBSD.org/cgi/mid.cgi?ca661e8a0710261302j188a05c4h63728eab67f6068>

-- 
With best regards, Gleb Kozyrev.