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page_kernel_nocache
2012 Jun 15
3
[HYBRID] : mapping IO mems in the EPT
...g my refresh to latest linux, I noticed, direct mapping of all
non-RAM pages in xen_set_identity_and_release(). I currently don''t map
all at front, but as needed looking at the PAGE_IO bit in the pte. One
result of that is minor change to common code macro:
__set_fixmap(idx, phys, PAGE_KERNEL_NOCACHE) to
to __set_fixmap(idx, phys, PAGE_KERNEL_IO_NOCACHE)
To avoid this change, and keep all my changes limited to xen files only,
I thought I could just map the entire non-ram pages up front too. But
I am concerned the EPT may grow too large? Specially, when we get to
*really* large NUMA b...