From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx156.postini.com [74.125.245.156]) by kanga.kvack.org (Postfix) with SMTP id 4DE816B0080 for ; Thu, 15 Aug 2013 17:37:36 -0400 (EDT) Date: Thu, 15 Aug 2013 16:37:34 -0500 From: Russ Anderson Subject: Re: [PATCH] memblock, numa: Binary search node id Message-ID: <20130815213734.GA28658@sgi.com> Reply-To: Russ Anderson References: <1376545589-32129-1-git-send-email-yinghai@kernel.org> <20130815134348.bb119a7987af0bb64ed77b7b@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: owner-linux-mm@kvack.org List-ID: To: Yinghai Lu Cc: Andrew Morton , Tejun Heo , Linux MM , Linux Kernel Mailing List On Thu, Aug 15, 2013 at 02:06:44PM -0700, Yinghai Lu wrote: > On Thu, Aug 15, 2013 at 1:43 PM, Andrew Morton > wrote: > > On Wed, 14 Aug 2013 22:46:29 -0700 Yinghai Lu 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@sgi.com -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org