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 --- mm/page-writeback.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'mm/page-writeback.c') diff --git a/mm/page-writeback.c b/mm/page-writeback.c index 4ec7026c7bab..60c7244c42e4 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -111,7 +111,7 @@ static void get_writeback_state(struct writeback_state *wbs) { wbs->nr_dirty = read_page_state(nr_dirty); wbs->nr_unstable = read_page_state(nr_unstable); - wbs->nr_mapped = read_page_state(nr_mapped); + wbs->nr_mapped = global_page_state(NR_FILE_MAPPED); wbs->nr_writeback = read_page_state(nr_writeback); } -- cgit v1.2.3