From: "Martin J. Bligh" <Martin.Bligh@us.ibm.com>
To: Andreas Dilger <adilger@turbolabs.com>, aputhiya <aputhiya@temple.edu>
Cc: linux-smp@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: APIC Cluster Model
Date: Fri, 09 Nov 2001 16:51:09 -0800 [thread overview]
Message-ID: <302322260.1005324669@mbligh.des.sequent.com> (raw)
In-Reply-To: <20011108150158.D9043@lynx.no>
>> Linux uses FLAT MODEL for setting up the IO APIC for SMP machines (Intel
>> IA-32 arch). I was wondering if the CLUSTER MODEL has been implemented
>> in any of later SMP kernels?
>
> Yes, the IBM folks implemented this for CONFIG_MULITQUAD. I don't know
> the details, but it is in stock 2.4.13+ kernels at least.
Look for things switched on clustered_apic_mode - some of it is
specific to IBM NUMA-Q (and should probably be switched on
something else that's also triggered by CONFIG_MULTIQUAD),
but most of it is switching to clustered APIC mode.
If you have another machine that uses this mode, feel free to
mail me any questions you have about what I did.
Martin.
prev parent reply other threads:[~2001-11-09 0:52 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-11-08 21:28 aputhiya
2001-11-08 22:01 ` Andreas Dilger
2001-11-10 0:51 ` Martin J. Bligh [this message]
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