Re: Hugetlb demanding paging for -mm tree

William Lee Irwin III
2004-08-10T08:55:31Z

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