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Re: What's the status of x2APIC support in Linux kernel?

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From: Andi Kleen <andi@...>
To: Jike Song <albcamus@...>
Cc: Andi Kleen <andi@...>, Rijndael Cosque <rijcos@...>, <linux-kernel@...>
Subject: Re: What's the status of x2APIC support in Linux kernel?
Date: Saturday, February 2, 2008 - 12:43 am

> Section 5 and section 9.5 describe 'I/OxAPIC'. I'm not sure if it is

I'm not sure what the point of your questions is.  Do you want to 
do something concrete or are you just interested in random buzzwords?

Anyways as far as I know Linux supports the IO APICs implemented in all
x86 chipsets fully. That is it doesn't use every possible feature they have,
but I'm not aware of any particular limitation caused by Linux
not supporting some IO APIC feature.

The reason for the local x/APIC was that the original non x APIC did not support
more than 8 logical CPUs being active in the system. Presumably IO xAPIC 
refers to the IO APIC without this limitation too.

-Andi
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Messages in current thread:
What's the status of x2APIC support in Linux kernel?, Rijndael Cosque, (Fri Feb 1, 4:43 am)
Re: What's the status of x2APIC support in Linux kernel?, Peter Zijlstra, (Fri Feb 1, 5:46 am)
Re: What's the status of x2APIC support in Linux kernel?, Jike Song, (Fri Feb 1, 4:53 am)
Re: What's the status of x2APIC support in Linux kernel?, Andi Kleen, (Fri Feb 1, 8:17 am)
Re: What's the status of x2APIC support in Linux kernel?, Jike Song, (Fri Feb 1, 10:55 pm)
Re: What's the status of x2APIC support in Linux kernel?, Andi Kleen, (Sat Feb 2, 12:43 am)
Re: What's the status of x2APIC support in Linux kernel?, Yinghai Lu, (Sat Feb 2, 1:43 pm)
Re: What's the status of x2APIC support in Linux kernel?, Siddha, Suresh B, (Fri Feb 1, 2:08 pm)
Re: What's the status of x2APIC support in Linux kernel?, Bjorn Helgaas, (Thu Feb 14, 3:06 pm)
Re: What's the status of x2APIC support in Linux kernel?, Siddha, Suresh B, (Thu Feb 14, 5:48 pm)