From: "Maciej W. Rozycki" <macro@linux-mips.org>
To: Jan Beulich <jbeulich@novell.com>
Cc: Ingo Molnar <mingo@elte.hu>,
tglx@linutronix.de, linux-kernel@vger.kernel.org, hpa@zytor.com
Subject: Re: [PATCH] x86: avoid early crash in disable_local_APIC()
Date: Fri, 16 Jan 2009 21:26:38 +0000 (GMT) [thread overview]
Message-ID: <alpine.LFD.1.10.0901162122520.29021@ftp.linux-mips.org> (raw)
In-Reply-To: <497051E7.76E4.0078.0@novell.com>
On Fri, 16 Jan 2009, Jan Beulich wrote:
> Is this with a config that has X86_IO_APIC off (i.e. one the practical use of
> which I never understood, and hence easily forget to consider)? Otherwise
> I can't see how that could happen.
A lot of systems have a P6-class CPU which has a local APIC and no I/O
APIC in the chipset. My old laptop was an example of one. It saves some
memory to have X86_IO_APIC disabled on such systems, while still being
able to use the local APIC for the NMI watchdog and PeMo.
Maciej
prev parent reply other threads:[~2009-01-16 21:26 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-14 12:28 Jan Beulich
2009-01-15 11:05 ` Ingo Molnar
2009-01-15 22:47 ` Ingo Molnar
2009-01-15 22:47 ` Ingo Molnar
2009-01-16 8:22 ` Jan Beulich
2009-01-16 13:09 ` Ingo Molnar
2009-01-16 21:26 ` Maciej W. Rozycki [this message]
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