On Thu, 26 Apr 2007 11:47:44 +0200 Andi Kleen <[EMAIL PROTECTED]> 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. > > 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. > Hmm...sounds reasonable. I have 2 idea for automatic way.. (1)Use new zonelist ordering always and move init_task's tied cpu to a cpu on the best node. Child processes will start in good nodes even if Node 0 has small memory. (2) Set Node's local highest zone to the top of zonelist. I like (1). Does anyone have an idea ? -Kame - 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/
