From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from d01relay04.pok.ibm.com (d01relay04.pok.ibm.com [9.56.227.236]) by e3.ny.us.ibm.com (8.12.11/8.12.11) with ESMTP id j8SGgcZr023376 for ; Wed, 28 Sep 2005 12:42:38 -0400 Received: from d01av01.pok.ibm.com (d01av01.pok.ibm.com [9.56.224.215]) by d01relay04.pok.ibm.com (8.12.10/NCO/VERS6.7) with ESMTP id j8SGgYbd104138 for ; Wed, 28 Sep 2005 12:42:38 -0400 Received: from d01av01.pok.ibm.com (loopback [127.0.0.1]) by d01av01.pok.ibm.com (8.12.11/8.13.3) with ESMTP id j8SGgYB7020960 for ; Wed, 28 Sep 2005 12:42:34 -0400 Subject: Re: [patch] bug of pgdat_list connection in init_bootmem() From: Dave Hansen In-Reply-To: <20050928223844.8655.Y-GOTO@jp.fujitsu.com> References: <20050928223844.8655.Y-GOTO@jp.fujitsu.com> Content-Type: text/plain Date: Wed, 28 Sep 2005 09:42:15 -0700 Message-Id: <1127925735.10315.232.camel@localhost> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Yasunori Goto Cc: Andrew Morton , linux-mm List-ID: On Wed, 2005-09-28 at 22:50 +0900, Yasunori Goto wrote: > I would like to remove this pgdat_list, to simplify hot-add/remove > a node. and posted patch before. > http://marc.theaimsgroup.com/?l=linux-mm&m=111596924629564&w=2 > http://marc.theaimsgroup.com/?l=linux-mm&m=111596953711780&w=2 > > I would like to repost after getting performance impact by this. > But it is very hard that I can get time to use big NUMA machine now. > So, I don't know when I will be able to repost it. > > Anyway, this should be modified before remove pgdat_list. Could you resync those to a current kernel and resend them? I'll take them into -mhp for a bit. I'd be very skeptical that it would hurt performance. If nothing else, it just makes the pgdat smaller, and the likelyhood of having the next bit in a bitmask and the NODE_DATA() entry in your cache is slightly higher than some random pgdat->list. -- Dave -- 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