From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andi Kleen Date: Thu, 08 Dec 2005 21:08:50 +0000 Subject: Re: [PATCH 1/3] Zone reclaim V3: main patch Message-Id: <20051208210850.GS11190@wotan.suse.de> List-Id: References: <20051208203707.30456.57439.sendpatchset@schroedinger.engr.sgi.com> In-Reply-To: <20051208203707.30456.57439.sendpatchset@schroedinger.engr.sgi.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Christoph Lameter Cc: akpm@osdl.org, Christoph Hellwig , linux-ia64@vger.kernel.org, steiner@sgi.com, linux-kernel@vger.kernel.org, ak@suse.de, Wu Fengguang > Zone reclaim is enabled if the maximum distance to another node is higher > than RECLAIM_DISTANCE, which may be defined by an arch. By default > RECLAIM_DISTANCE is 20 meaning the distance to another node in the > same component (enclosure or motherboard). Sorry I made a mistake here earlier. On checking the ACPI spec again it's valid to have distances < 20 (e.g. for a 1.5 NUMA factor it would be legally 15) So better just check > LOCAL_DISTANCE, not >= 20. Also a lot of Opteron BIOS get that wrong, but I'm adding some sanity checking now so it should work in future. -Andi