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Message-ID: <aec7e5c30510262325r7bf17bf3ved230fe79156e6ad@mail.gmail.com>
Date: Thu, 27 Oct 2005 15:25:40 +0900
From: Magnus Damm <magnus.damm@gmail.com>
To: Andi Kleen <ak@suse.de>
Subject: Re: [discuss] [rfc] x86_64: Kconfig changes for NUMA
Cc: discuss@x86-64.org, Ravikiran G Thirumalai <kiran@scalex86.org>,
       linux-kernel@vger.kernel.org,
       "Shai Fultheim (Shai@scalex86.org)" <shai@scalex86.org>
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On 10/27/05, Magnus Damm <magnus.damm@gmail.com> wrote:
> On 10/26/05, Andi Kleen <ak@suse.de> wrote:
> > On Wednesday 26 October 2005 09:09, Ravikiran G Thirumalai wrote:
> >
> > >
> > > 1. Makes NUMA a config option like other arches
> > > 2. Makes topology detection options like K8_NUMA dependent on NUMA
> > > 3. Choosing ACPI NUMA detection can be done from the standard
> > >    "Processor type and features" menu
> > > Comments?
> >
> > It's in principle ok except that I don't like the dependencies and
> > defaults. K8_NUMA shouldn't be dependent on !M_PSC. And the defaults
> > should be just dropped.
>
> While at it, could you please consider to remove the SMP dependency
> from NUMA_EMU? 2.6.14-rc5-git5 builds and works with !SMP and
> NUMA_EMU.
>
> Why?
> 1. No need to force SMP when not needed.
> 2. qemu-system-x86_64 does not currently work with SMP kernels.

Update:

Both CONFIG_NUMA_EMU and CONFIG_K8_NUMA build and run just fine
without CONFIG_SMP. Not sure about CONFIG_ACPI_NUMA though.

/ magnus