Re: Hugetlb demanding paging for -mm tree

From: William Lee Irwin III <wli_at_holomorphy.com>
Date: 2004-08-10 18:55:31
William Lee Irwin III <> wrote on Monday, August 09, 2004 11:59 AM:
>> As things stand in mainline, it's not an obvious issue. Ken appears to
>> be calling it for hugetlb in the ZFOD fault handling patches, which
>> have the issue that it may behave badly in several respects when
>> acting on large pages. The cache coherency bits in update_mmu_fault()
>> are necessary in general, but mainline omits them. It should only
>> result in intermittent failures on machines with sufficiently
>> incoherent caches. 

On Tue, Aug 10, 2004 at 01:52:02AM -0700, Seth, Rohit wrote:
> Will the flush_dcache_page for hugepages even on incoherent caches be
> not enough.  And that flush_dcache_page should be done in alloc_hugepage
> after clearing the page(or change the clear_highpage to
> clear_user_high_page).

Could you rephrase that? I'm having trouble figuring out what you meant.


-- wli
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Received on Tue Aug 10 04:58:55 2004

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