Andrew Morton wrote:
KAMEZAWA Hiroyuki <[email protected]> wrote:
This patch removes zone_mem_map from zone.
By this, (generic) page_to_pfn and pfn_to_page can use the same logic.
I assume this is dependent upon unify-pfn_to_page-*.patch?
yes. sorry for forgetting to write it.
This modifies page_to_pfn implementation. Could anyone do performance test on NUMA ?
Do you expect there to be NUMA performance problems? If so, how do they
arise and what sort of tests should be run?
I don't expect it. But when I posted this before (as RFC), some persons
(Martin J. Bligh and Dave Hansen) had concerns about it.
I think the heaviest users of page_to_pfn() are the page allocator and
mk_pte(page_to_pfn(page), hogehoge).
So, tests like "mmap -> touch all -> unmap" will be good test.
powerpc and ia64 is not a good test environment, because they don't use
page_to_pfn() of generic DISCONTIG definitions.
other NUMAs (i386, x86_64 etc..) will be good.
Thanks,
-- Kame
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