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Message-ID: <20130815213734.GA28658@sgi.com> Date: Thu, 15 Aug 2013 16:37:34 -0500 From: Russ Anderson <rja@....com> To: Yinghai Lu <yinghai@...nel.org> Cc: Andrew Morton <akpm@...ux-foundation.org>, Tejun Heo <tj@...nel.org>, Linux MM <linux-mm@...ck.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: Re: [PATCH] memblock, numa: Binary search node id On Thu, Aug 15, 2013 at 02:06:44PM -0700, Yinghai Lu wrote: > On Thu, Aug 15, 2013 at 1:43 PM, Andrew Morton > <akpm@...ux-foundation.org> wrote: > > On Wed, 14 Aug 2013 22:46:29 -0700 Yinghai Lu <yinghai@...nel.org> wrote: > > > >> Current early_pfn_to_nid() on arch that support memblock go > >> over memblock.memory one by one, so will take too many try > >> near the end. > >> > >> We can use existing memblock_search to find the node id for > >> given pfn, that could save some time on bigger system that > >> have many entries memblock.memory array. > > > > Looks nice. I wonder how much difference it makes. > > Russ said he would test on his 256 nodes system, but looks he never > got chance. I reserved time tonight on a couple big systems to measure the performance difference. Thanks, -- Russ Anderson, OS RAS/Partitioning Project Lead SGI - Silicon Graphics Inc rja@....com -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.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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