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authorChristoph Lameter <clameter@sgi.com>2006-06-30 04:55:34 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-30 14:25:34 -0400
commit65ba55f500a37272985d071c9bbb35256a2f7c14 (patch)
treee7735326ef2d2dca9d00a6c5ae47e9eb03c7834f /mm/rmap.c
parent2244b95a7bcf8d24196f8a3a44187ba5dfff754c (diff)
[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 <clameter@sgi.com> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm/rmap.c')
-rw-r--r--mm/rmap.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/mm/rmap.c b/mm/rmap.c
index e76909e880ca..af5e9808e65d 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -455,7 +455,7 @@ static void __page_set_anon_rmap(struct page *page,
455 * nr_mapped state can be updated without turning off 455 * nr_mapped state can be updated without turning off
456 * interrupts because it is not modified via interrupt. 456 * interrupts because it is not modified via interrupt.
457 */ 457 */
458 __inc_page_state(nr_mapped); 458 __inc_zone_page_state(page, NR_FILE_MAPPED);
459} 459}
460 460
461/** 461/**
@@ -499,7 +499,7 @@ void page_add_new_anon_rmap(struct page *page,
499void page_add_file_rmap(struct page *page) 499void page_add_file_rmap(struct page *page)
500{ 500{
501 if (atomic_inc_and_test(&page->_mapcount)) 501 if (atomic_inc_and_test(&page->_mapcount))
502 __inc_page_state(nr_mapped); 502 __inc_zone_page_state(page, NR_FILE_MAPPED);
503} 503}
504 504
505/** 505/**
@@ -531,7 +531,7 @@ void page_remove_rmap(struct page *page)
531 */ 531 */
532 if (page_test_and_clear_dirty(page)) 532 if (page_test_and_clear_dirty(page))
533 set_page_dirty(page); 533 set_page_dirty(page);
534 __dec_page_state(nr_mapped); 534 __dec_zone_page_state(page, NR_FILE_MAPPED);
535 } 535 }
536} 536}
537 537