Skip site navigation (1)Skip section navigation (2)
Date:      Wed, 12 Nov 2003 11:56:31 -0600
From:      "Matthew D. Fuller" <fullermd@over-yonder.net>
To:        John Baldwin <jhb@FreeBSD.org>
Cc:        current@FreeBSD.org
Subject:   Re: APIC-UP related panic
Message-ID:  <20031112175631.GQ12248@over-yonder.net>
In-Reply-To: <XFMail.20031111113526.jhb@FreeBSD.org>
References:  <200311110220.10204@harrymail> <XFMail.20031111113526.jhb@FreeBSD.org>

next in thread | previous in thread | raw e-mail | index | archive | help
I, for one, am always pleased to see these sort of in-depth explanations
of these sort of shims.

On Tue, Nov 11, 2003 at 11:35:26AM -0500 I heard the voice of
John Baldwin, and lo! it spake thus:
> 
> It's documented in /sys/i386/conf/NOTES now along with 'device apic'.  For
> a longer explanation of what is happening:
>
[...]
> 
> So, by default, to work around motherboards that don't hook IRQ 0
> up to the I/O APIC, we route IRQ 0 through the the 8259A PICs.
>
[...]
>  
> However, if NO_MIXED_MODE works, that is actually the more desirable
> way to run your system.

How common is the need for this?  Does turning of mixed mode when it's
not needed give any real advantages higher up?


-- 
Matthew Fuller     (MF4839)   |  fullermd@over-yonder.net
Systems/Network Administrator |  http://www.over-yonder.net/~fullermd/

"The only reason I'm burning my candle at both ends, is because I
      haven't figured out how to light the middle yet"



Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20031112175631.GQ12248>