Messages in this thread | | | Date | Thu, 01 Nov 2007 15:38:24 -0700 (PDT) | Subject | Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce per cpu access overhead | From | David Miller <> |
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From: Christoph Lameter <clameter@sgi.com> Date: Thu, 1 Nov 2007 15:15:39 -0700 (PDT)
> After boot is complete we allow the reduction of the size of the per cpu > areas . Lets say we only need 128k per cpu. Then the remaining pages will > be returned to the page allocator.
You don't know how much you will need. I exhausted the limit on sparc64 very late in the boot process when the last few userland services were starting up.
And if I subsequently bring up 100,000 IP tunnels, it will exhaust the per-cpu allocation area.
You have to make it fully dynamic, there is no way around it. - 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/
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