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    SubjectRe: [patch] voluntary-preempt-
    On Mon, 16 Aug 2004, Ingo Molnar wrote:
    > found the unmap_vmas() latency: pages get queued up for TLB flush (and
    > subsequent freeing) and the lock-break in unmap_vmas() didnt account for
    > this. When there's a preemption request and we do the lock-break it's
    > already too late: we first have to free possibly thousands of pages,

    Thousands? Or FREE_PTE_NR 506? Ah, ia64 has FREE_PTE_NR 2048: thousands.


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