[PATCH 28/34] mm: clockpro-PG_reclaim2.patch

[Peter Zijlstra]

From: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>

Add a second PG_flag to the page reclaim framework.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Signed-off-by: Marcelo Tosatti <marcelo.tosatti@xxxxxxxxxxxx>

---

 include/linux/page-flags.h |    2 ++
 mm/hugetlb.c               |    4 ++--
 mm/page_alloc.c            |    3 +++
 3 files changed, 7 insertions(+), 2 deletions(-)

Index: linux-2.6/include/linux/page-flags.h
===================================================================
--- linux-2.6.orig/include/linux/page-flags.h	2006-03-13 20:38:26.000000000 +0100
+++ linux-2.6/include/linux/page-flags.h	2006-03-13 20:45:31.000000000 +0100
@@ -76,6 +76,8 @@
 #define PG_nosave_free		18	/* Free, should not be written */
 #define PG_uncached		19	/* Page has been mapped as uncached */
 
+#define PG_reclaim2		20	/* reserved by the mm reclaim code */
+
 /*
  * Global page accounting.  One instance per CPU.  Only unsigned longs are
  * allowed.
Index: linux-2.6/mm/page_alloc.c
===================================================================
--- linux-2.6.orig/mm/page_alloc.c	2006-03-13 20:38:26.000000000 +0100
+++ linux-2.6/mm/page_alloc.c	2006-03-13 20:45:31.000000000 +0100
@@ -150,6 +150,7 @@ static void bad_page(struct page *page)
 			1 << PG_private |
 			1 << PG_locked	|
 			1 << PG_reclaim1 |
+			1 << PG_reclaim2 |
 			1 << PG_dirty	|
 			1 << PG_reclaim |
 			1 << PG_slab    |
@@ -361,6 +362,7 @@ static inline int free_pages_check(struc
 			1 << PG_private |
 			1 << PG_locked	|
 			1 << PG_reclaim1 |
+			1 << PG_reclaim2 |
 			1 << PG_reclaim	|
 			1 << PG_slab	|
 			1 << PG_swapcache |
@@ -518,6 +520,7 @@ static int prep_new_page(struct page *pa
 			1 << PG_private	|
 			1 << PG_locked	|
 			1 << PG_reclaim1 |
+			1 << PG_reclaim2 |
 			1 << PG_dirty	|
 			1 << PG_reclaim	|
 			1 << PG_slab    |
Index: linux-2.6/mm/hugetlb.c
===================================================================
--- linux-2.6.orig/mm/hugetlb.c	2006-03-13 20:38:26.000000000 +0100
+++ linux-2.6/mm/hugetlb.c	2006-03-13 20:45:31.000000000 +0100
@@ -152,8 +152,8 @@ static void update_and_free_page(struct 
 	nr_huge_pages_node[page_zone(page)->zone_pgdat->node_id]--;
 	for (i = 0; i < (HPAGE_SIZE / PAGE_SIZE); i++) {
 		page[i].flags &= ~(1 << PG_locked | 1 << PG_error | 1 << PG_referenced |
-				1 << PG_dirty | 1 << PG_reclaim1 | 1 << PG_reserved |
-				1 << PG_private | 1<< PG_writeback);
+				1 << PG_dirty | 1 << PG_reclaim1 | 1 << PG_reclaim2 |
+				1 << PG_reserved | 1 << PG_private | 1<< PG_writeback);
 		set_page_count(&page[i], 0);
 	}
 	set_page_count(page, 1);
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/