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On Mon, Oct 17, 2005 at 05:40:56PM +0200, Andi Kleen wrote: > First this problem is definitely not critical. AFAIK it only happens on > scalex's unreleased machines. Intel NUMA x86 machines are really rare > and on AMD it doesn't happen because the swiotlb is not used there. It's not used by default, but there are cases where it's used and it would be a shame to release a major kernel and knowingly break them. For example, any setup that used iommu_force or any non-AMD x86-64 machine with more than 4GB of memory and only 32-bit capable DMA devices. > Both NODE(0) and node_online_map are risky. NODE(0) may break IA64 > (they share this code) and node_online_map may break one of the weirder > ARM platforms again (for which the original revert was done) I don't have an IA64 machine, but if the NODE(0) fix is safe there, I vote for it for 2.6.14-rc4. Another alternative is to temporarily provide a different version of swiotlb_init() for x86-64 and IA64 - I can whip up a patch if that's acceptable. Cheers, Muli -- Muli Ben-Yehuda http://www.mulix.org | http://mulix.livejournal.com/ - 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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