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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>
Cc:        freebsd-current@freebsd.org
Subject:   Re: Deadlock, exclusive sx so_rcv_sx, amd64
Message-ID:  <ca661e8a0710290436o18f461b5j511fceb109773b4f@mail.gmail.com>
In-Reply-To: <4725B7EA.5080807@FreeBSD.org>
References:  <ca661e8a0710211529y2a48b4a9h78da4211b3f09274@mail.gmail.com> <200710251435.58984.jhb@freebsd.org> <ca661e8a0710260252u4f5c1c3di22828143e81e3df2@mail.gmail.com> <200710261222.28656.jhb@freebsd.org> <20071026184536.GE37471@deviant.kiev.zoral.com.ua> <ca661e8a0710261302j188a05c4h63728eab67f6068@mail.gmail.com> <ca661e8a0710281849g7147a3ao97d68fd2f12b3daf@mail.gmail.com> <4725B7EA.5080807@FreeBSD.org>

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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.



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