On Thu, 26 Apr 2007, Andi Kleen wrote: > On Thursday 26 April 2007 11:34:17 KAMEZAWA Hiroyuki wrote: > > > > Changelog from V1 -> V2 > > - sysctl name is changed to be relaxed_zone_order > > - NORMAL->NORMAL->....->DMA->DMA->DMA order (new ordering) is now default. > > NORMAL->DMA->NORMAL->DMA order (old ordering) is optional. > > - addes boot opttion to set relaxed_zone_order. ia64 is supported now. > > - Added documentation > > > > patch is against 2.6.21-rc7-mm2. tested on ia64 NUMA box. works well. > > IMHO the change should be default (without any options) unless someone > can come up with a good reason why not. On x86-64 it should be definitely > default.
It is not a good idea if node 0 has both DMA and NORMAL memory and normal memory is a small fraction of node memory. In that case lots of allocations get redirected to node 1. > If there is a good reason on some architecture or machine a user option is > also not a > good idea, but instead it should be set automatically by that architecture or > machine > on boot. Right. That was my thinking. - 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/
