Re: [patch] voluntary-preempt-2.6.8.1-P1

[Hugh Dickins]

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.

Hugh

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