From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mel Gorman Message-Id: <20070808161605.32320.40722.sendpatchset@skynet.skynet.ie> In-Reply-To: <20070808161504.32320.79576.sendpatchset@skynet.skynet.ie> References: <20070808161504.32320.79576.sendpatchset@skynet.skynet.ie> Subject: [PATCH 3/3] Apply MPOL_BIND policy to two highest zones when highest is ZONE_MOVABLE Date: Wed, 8 Aug 2007 17:16:05 +0100 (IST) Sender: owner-linux-mm@kvack.org Return-Path: To: Lee.Schermerhorn@hp.com, pj@sgi.com, ak@suse.de, kamezawa.hiroyu@jp.fujitsu.com, clameter@sgi.com Cc: Mel Gorman , akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org List-ID: The NUMA layer only supports the MPOL_BIND NUMA policy for the highest zone. When ZONE_MOVABLE is configured with kernelcore=, the the highest zone becomes ZONE_MOVABLE. The result is that the bind policy policies is only applied to allocations like anonymous pages and page cache allocated from ZONE_MOVABLE when the zone is used. This patch applies policies to the two highest zones when the highest zone is ZONE_MOVABLE. As ZONE_MOVABLE consists of pages from the highest "real" zone, these two zones are equivalent in policy terms. Signed-off-by: Mel Gorman --- include/linux/mempolicy.h | 2 +- mm/mempolicy.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.23-rc1-mm2-010_use_zonelist/include/linux/mempolicy.h linux-2.6.23-rc1-mm2-015_treat_movable_highest/include/linux/mempolicy.h --- linux-2.6.23-rc1-mm2-010_use_zonelist/include/linux/mempolicy.h 2007-08-08 11:35:09.000000000 +0100 +++ linux-2.6.23-rc1-mm2-015_treat_movable_highest/include/linux/mempolicy.h 2007-08-08 14:36:52.000000000 +0100 @@ -157,7 +157,7 @@ extern enum zone_type policy_zone; static inline void check_highest_zone(enum zone_type k) { - if (k > policy_zone) + if (k > policy_zone && k != ZONE_MOVABLE) policy_zone = k; } diff -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.23-rc1-mm2-010_use_zonelist/mm/mempolicy.c linux-2.6.23-rc1-mm2-015_treat_movable_highest/mm/mempolicy.c --- linux-2.6.23-rc1-mm2-010_use_zonelist/mm/mempolicy.c 2007-08-08 11:35:09.000000000 +0100 +++ linux-2.6.23-rc1-mm2-015_treat_movable_highest/mm/mempolicy.c 2007-08-08 14:36:52.000000000 +0100 @@ -151,7 +151,7 @@ static struct zonelist *bind_zonelist(no lower zones etc. Avoid empty zones because the memory allocator doesn't like them. If you implement node hot removal you have to fix that. */ - k = policy_zone; + k = MAX_NR_ZONES - 1; while (1) { for_each_node_mask(nd, *nodes) { struct zone *z = &NODE_DATA(nd)->node_zones[k]; -- 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