Messages in this thread | | | Date | Thu, 8 Apr 2004 01:18:06 +0200 | From | Andrea Arcangeli <> | Subject | Re: -mmX 4G patches feedback [numbers: how much performance impact] |
| |
On Wed, Apr 07, 2004 at 04:21:44PM -0700, Martin J. Bligh wrote: > Speaking of which, pte_highmem is stinking expensive itself. There's > probably a large class of workloads that'd work with out pte_highmem > if we had 4/4 split (or shared pagetables. Grrr ;-))
hey, I can add a sysctl in 5 minutes to disable pte_highmem at runtime, why do you think it's expensive, it should be not, it's all atomic kmaps only doing invlpg. The few workloads trashing on the ptes manipulation needs pte_highmem anyways. If I thought it was expensive for any common load the sysctl would be already there. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |