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

Hugh Dickins
2004-08-16T11:44:59Z

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