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Re: [Xen-devel] [PATCH] xen x86_64 and CONFIG_FLATMEM

from [Mark McLoughlin]

[Permanent Link][Original]

To:	Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Subject:	Re: [Xen-devel] [PATCH] xen x86_64 and CONFIG_FLATMEM
From:	Mark McLoughlin <markmc@xxxxxxxxxx>
Date:	Tue, 25 Jul 2006 16:23:03 +0100
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On Tue, 2006-07-25 at 15:36 +0100, Keir Fraser wrote:
> On 19 Jul 2006, at 11:29, Mark McLoughlin wrote:
> 
> >     With CONFIG_SPARSEMEM on xen x86_64, you get an oops in mem_init where
> > it references mem_map; mem_map is only initialized with CONFIG_FLATMEM.
> >
> >     Suggest a Kconfig change like the one attached?
> 
> Perhaps better to forcibly disable CONFIG_NUMA if CONFIG_XEN is 
> enabled? We can't (yet) pick up NUMA info from Xen anyway, and it 
> probably enables a bunch of code that hasn't been much tested on Xen.

        NUMA is already disabled if CONFIG_XEN is enabled. But SPARSEMEM can be
enabled even without NUMA:

 config ARCH_SPARSEMEM_ENABLE
        def_bool y
-       depends on (NUMA || EXPERIMENTAL)
+       depends on (NUMA || EXPERIMENTAL) && !X86_64_XEN

Cheers,
Mark.


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