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Date:      Sat, 26 May 2007 02:34:43 +0200
From:      Attilio Rao <attilio@FreeBSD.org>
To:        Joe Marcus Clarke <marcus@marcuscom.com>
Cc:        Jeff Roberson <jroberson@chesapeake.net>, jeff@FreeBSD.org, Current@FreeBSD.org
Subject:   Re: Panic on -CURRENT after LDT changes
Message-ID:  <465780A3.8040603@FreeBSD.org>
In-Reply-To: <1180138048.94117.17.camel@shumai.marcuscom.com>
References:  <1179962663.75721.6.camel@shumai.marcuscom.com>	 <20070523165051.G9443@10.0.0.1> <4655D5C1.2010905@FreeBSD.org>	 <1180022919.10757.24.camel@shumai.marcuscom.com>	 <3bbf2fe10705240930o10f37febt9fb5f0a46bd193c3@mail.gmail.com>	 <4657267C.2070306@marcuscom.com>	 <3bbf2fe10705251116h1a4606fg6250d917247a5143@mail.gmail.com>	 <46572970.5080201@marcuscom.com>	 <3bbf2fe10705251135j2b858529l964bf22285d5554e@mail.gmail.com>	 <3bbf2fe10705251209y658d1910rd62286388bccc092@mail.gmail.com>	 <4657357C.4050009@marcuscom.com> <4657683E.6040107@FreeBSD.org>	 <1180136064.94117.14.camel@shumai.marcuscom.com>	 <46577838.3020107@FreeBSD.org> <1180138048.94117.17.camel@shumai.marcuscom.com>

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Joe Marcus Clarke wrote:
> On Sat, 2007-05-26 at 01:58 +0200, Attilio Rao wrote:
>> Joe Marcus Clarke wrote:
>>> On Sat, 2007-05-26 at 00:50 +0200, Attilio Rao wrote:
>>>> Joe Marcus Clarke wrote:
>>>>> -----BEGIN PGP SIGNED MESSAGE-----
>>>>> Hash: SHA1
>>>>>
>>>>>
>>>>> Thanks.  I just finished building a PREEMPTION-less kernel.  I'll hold
>>>>> off on the test until I get your patch.
>>>> Hello Joe,
>>>> can you please try this patch:
>>>> http://users.gufi.org/~rookie/works/patches/sys_machdep.diff
>>>>
>>>> maybe using with and without PREEMPTION?
>>> With PREEMPTION yields a new crash:
>> Could you please re-download the patch and try this new one?
> 
> Ding, ding, ding.  With this patch plus PREEMPTION, I no longer get a
> crash.  Given that is the ideal state (i.e. closest to a GENERIC
> kernel), I think this is a winner.

Could you please try this better approach on a VANILLA kernel and say if 
it still works for you:
http://users.gufi.org/~rookie/works/patches/schedlock/ldt2.diff

Thanks a lot,
Attilio





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