Messages in this thread Patch in this message | | | From | Yinghai Lu <> | Subject | [PATCH v9 28/46] x86, mm: Add pointer about Xen mmu requirement for alloc_low_pages | Date | Wed, 28 Nov 2012 13:47:39 -0800 |
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From: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Add link for more information 279b706 x86,xen: introduce x86_init.mapping.pagetable_reserve
-v2: updated to commets from hpa to include commit name.
Signed-off-by: Yinghai Lu <yinghai@kernel.org> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> --- arch/x86/mm/init.c | 9 +++++++++ 1 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c index daff14c..a8e6d07 100644 --- a/arch/x86/mm/init.c +++ b/arch/x86/mm/init.c @@ -25,6 +25,15 @@ unsigned long __meminitdata pgt_buf_top; static unsigned long min_pfn_mapped; +/* + * Pages returned are already directly mapped. + * + * Changing that is likely to break Xen, see commit: + * + * 279b706 x86,xen: introduce x86_init.mapping.pagetable_reserve + * + * for detailed information. + */ __ref void *alloc_low_pages(unsigned int num) { unsigned long pfn; -- 1.7.7
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