Re: [PATCH] x86/i386: Check PSE bit before using PAGE_KERNEL_LARGE.

[H. Peter Anvin]

On 05/31/2012 12:40 PM, Konrad Rzeszutek Wilk wrote:
> During bootup we would unconditionally do this on any
> machine that was built with CONFIG_NUMA=y on i386:
> 
> setup_arch
>   \-initmem_init
>       \-x86_numa_init (with dummy_init as callback)
>           \- init_alloc_remap
>                \- set_pmd_pfn (with PAGE_PSE)
> 
> without checking to see if the CPU supports PSE. This
> patch adds that and also allows the init_alloc_remap function
> to properly work by falling back on PTEs.
> 

Well, the code looks like it is PAE-specific, and PAE implies PSE.

Xen breaks that, but that is a divergence of Xen from x86.

	-hpa



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