Messages in this thread | | | Date | Fri, 10 Dec 2004 15:54:41 +1100 | From | Nick Piggin <> | Subject | Re: page fault scalability patch V12 [0/7]: Overview and performance tests |
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Nick Piggin wrote:
> Yep, the update_mmu_cache issue is real. There is a parallel problem > that is update_mmu_cache can be called on a pte who's page has since > been evicted and reused. Again, that looks safe on IA64, but maybe > not on other architectures. > > It can be solved by moving lru_cache_add to after update_mmu_cache in > all cases but the "update accessed bit" type fault. I solved that by > simply defining that out for architectures that don't need it - a raced > fault will simply get repeated if need be. >
The page-freed-before-update_mmu_cache issue can be solved in that way, not the set_pte and update_mmu_cache not performed under the same ptl section issue that you raised. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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