Message-ID: <4193A335.5090304@spymac.com>
Date: Thu, 11 Nov 2004 18:36:53 +0100
From: Gunther Persoons <gunther_persoons@spymac.com>
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To: Ingo Molnar <mingo@elte.hu>
CC: linux-kernel@vger.kernel.org
Subject: Re: [patch] Real-Time Preemption, -RT-2.6.10-rc1-mm3-V0.7.25-0
References: <20041027001542.GA29295@elte.hu> <20041103105840.GA3992@elte.hu> <20041106155720.GA14950@elte.hu> <20041108091619.GA9897@elte.hu> <20041108165718.GA7741@elte.hu> <20041109160544.GA28242@elte.hu> <20041111144414.GA8881@elte.hu> <41938D60.4070802@spymac.com> <20041111160819.GA26184@elte.hu> <20041111161235.GA26582@elte.hu> <20041111163030.GA27769@elte.hu>
In-Reply-To: <20041111163030.GA27769@elte.hu>
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Ingo Molnar wrote:

>* Ingo Molnar <mingo@elte.hu> wrote:
>
>  
>
>>just in case you are using UP-IOAPIC, could you enable CONFIG_SMP
>>(even if you are running an UP box) and see whether the lockup goes
>>away?  Which was the last -RT kernel that you tried that didnt lock up
>>in this fashion?
>>    
>>
>
>if with CONFIG_SMP it's more stable, could you try the following: turn
>off CONFIG_SMP again and edit arch/i386/kernel/io_apic.c and remove this
>string:
>
>	&& defined(CONFIG_SMP)
>
>(there should be only one occurence of this string.)
>
>this will turn the previous IO-APIC logic (used in -V0.7.24) back on.
>
>	Ingo
>
>  
>
It locked up after 20 minutes with CONFIG_SMP enabled.
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