From 65ba55f500a37272985d071c9bbb35256a2f7c14 Mon Sep 17 00:00:00 2001 From: Christoph Lameter Date: Fri, 30 Jun 2006 01:55:34 -0700 Subject: [PATCH] zoned vm counters: convert nr_mapped to per zone counter nr_mapped is important because it allows a determination of how many pages of a zone are not mapped, which would allow a more efficient means of determining when we need to reclaim memory in a zone. We take the nr_mapped field out of the page state structure and define a new per zone counter named NR_FILE_MAPPED (the anonymous pages will be split off from NR_MAPPED in the next patch). We replace the use of nr_mapped in various kernel locations. This avoids the looping over all processors in try_to_free_pages(), writeback, reclaim (swap + zone reclaim). [akpm@osdl.org: bugfix] Signed-off-by: Christoph Lameter Cc: Trond Myklebust Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/mmzone.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/linux/mmzone.h') diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index 543f9e411563..eb42c1277023 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -47,6 +47,9 @@ struct zone_padding { #endif enum zone_stat_item { + NR_FILE_MAPPED, /* mapped into pagetables. + only modified from process context */ + NR_VM_ZONE_STAT_ITEMS }; struct per_cpu_pages { -- cgit v1.2.3