On Tue, 14 Aug 2007, Andi Kleen wrote: > > > The DMA zone will be still there, but only reachable with special > > > functions. > > > > Not too happy with that one but this is going the right direcrtion. > > > > On NUMA this would still mean allocating space for the DMA zone on all > > nodes although we only need this on node 0. > > The DMA allocator is NUMA unaware. This means it doesn't require multiple > dma zones per node, but is happy with a global one that can live somewhere > else outside the pgdat. I also removed PCP and other fanciness so it's > really quite independent and much simpler than the normal one. It also > doesn't need try_to_free_pages() because in a isolated zone there > shouldn't be any freeable pages.
You said that ZONE_DMA will still be there right? So the zone will be replicated over all nodes but remain unused except for node 0. > There are still other architectures that use it. Biggest offender > is s390. I'll leave them to their respective maintainers. IA64 also uses ZONE_DMA to support 32bit controllers. So I think we can only get rid of ZONE_DMA in its 16MB incarnation for i386 and x86_64. But you will be keeping ZONE_DMA32? If so then it may be better to drop ZONE_DMA32 and make ZONE_DMA be below 4GB like other 64bit arches. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
