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    SubjectRe: [PATCH 2.4.23-pre8] Remove broken prefetching in free_one_pgd()
    >>>>> On Fri, 24 Oct 2003 13:56:31 -0700, "Luck, Tony" <tony.luck@intel.com> said:

    Tony> This patch was accepted into 2.5.55, attributed to "davej@uk".
    Tony> This code will prefetch from beyond the end of the page table
    Tony> being cleared ... which is clearly a bad thing if the page
    Tony> table in question is allocated from the last page of memory
    Tony> (or precedes a hole on a discontig mem system).

    Different arches behave differently, though. In the case of ia64,
    it'a always safe to prefetch (even with lfetch.fault).

    --david
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