Messages in this thread | | | Date | Thu, 16 Dec 2010 21:54:44 -0500 (EST) | From | Len Brown <> | Subject | Re: [PATCH] - Mapping ACPI tables as CACHED |
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> I'll bet we can improve the boot sequence so that > some of the stuff we do before we have cached mappings > we can do with cached mappings...
Nope, that is a losing bet...
The early mappings are temporary, but they are cached, for they use __pgprot(__PAGE_KERNEL_IO), which is (__PAGE_KERNEL | _PAGE_IOMAP)
rather than __pgprot(__PAGE_KERNEL_IO_NOCACHE) or its variants.
We just need to update the permanent mappings to match.
cheers, Len Brown, Intel Open Source Technology Center
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