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Date: Tue, 29 Mar 2005 14:58:34 -0800
From: Kris Kennaway <kris@obsecurity.org>
To: Oleg Tarasov <subscriber@osk.com.ua>
Message-ID: <20050329225834.GA20557@xor.obsecurity.org>
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cc: freebsd-stable@FreeBSD.org
Subject: Re: kernel panics on sio interrupt-level overflows
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On Tue, Mar 29, 2005 at 12:09:19PM +0200, Oleg Tarasov wrote:
> Hello,
>=20
> This problem had unusual solution. It seems the key to this problem is
> that FreeBSD 5.3-STABLE-p5 (I have updated my system) has DEADLOCKS
> when intensively using sio device on high speed (115200) with SMP support.
> It seems that MPSAFE causes those deadlocks. Turning
>=20
> debug.mpsafenet=3D"0"
>=20
> in /boot/loader.conf
> makes the system to work fine & stable instead of panicing every hour
> or more often

Does enabling WITNESS support (and possibly excluding
WITNESS_SKIPSPIN) produce any diagnostics?

Kris
 =20

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