>>>>> "Christoph" == Christoph Lameter <christoph@xxxxxxxxxxxx> writes: Christoph> On Tue, 12 Sep 2006, Jack Steiner wrote: >> I'm missing something here. On Altix, currently ALL of the memory >> is reported as being in the DMA zone: >> >> % cat /proc/budd* Node 0, zone DMA 3015 116 4 1 ... Node 1, zone >> DMA 4243 355 15 3 ... Node 2, zone DMA 4384 113 6 4 ... >> >> % cat /proc/zoneinfo Node 0, zone DMA pages free 5868 ... >> >> The DMA slabs are empty, though. Christoph> This is wrong. All memory should be in ZONE_NORMAL since we Christoph> have no DMA restrictions on Altix. This is harmless on Altix because we have an IOMMU - however we should in theory put all memory below 4GB into the DMA32 zone (if there was any memory there :) to use if we ever ran out of IOMMU slots when running 32 bit only capable PCI devices. I've never seen this happen so it's purely theoretical. Cheers, Jes - To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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