From: Peter Zijlstra <[email protected]>
Add a third PG_flag to the page reclaim framework.
Signed-off-by: Peter Zijlstra <[email protected]>
Signed-off-by: Marcelo Tosatti <[email protected]>
---
include/linux/page-flags.h | 1 +
mm/hugetlb.c | 3 ++-
mm/page_alloc.c | 3 +++
3 files changed, 6 insertions(+), 1 deletion(-)
Index: linux-2.6-git/include/linux/page-flags.h
===================================================================
--- linux-2.6-git.orig/include/linux/page-flags.h
+++ linux-2.6-git/include/linux/page-flags.h
@@ -77,6 +77,7 @@
#define PG_uncached 19 /* Page has been mapped as uncached */
#define PG_reclaim2 20 /* reserved by the mm reclaim code */
+#define PG_reclaim3 21 /* reserved by the mm reclaim code */
/*
* Global page accounting. One instance per CPU. Only unsigned longs are
Index: linux-2.6-git/mm/page_alloc.c
===================================================================
--- linux-2.6-git.orig/mm/page_alloc.c
+++ linux-2.6-git/mm/page_alloc.c
@@ -151,6 +151,7 @@ static void bad_page(struct page *page)
1 << PG_locked |
1 << PG_reclaim1 |
1 << PG_reclaim2 |
+ 1 << PG_reclaim3 |
1 << PG_dirty |
1 << PG_reclaim |
1 << PG_slab |
@@ -363,6 +364,7 @@ static inline int free_pages_check(struc
1 << PG_locked |
1 << PG_reclaim1 |
1 << PG_reclaim2 |
+ 1 << PG_reclaim3 |
1 << PG_reclaim |
1 << PG_slab |
1 << PG_swapcache |
@@ -521,6 +523,7 @@ static int prep_new_page(struct page *pa
1 << PG_locked |
1 << PG_reclaim1 |
1 << PG_reclaim2 |
+ 1 << PG_reclaim3 |
1 << PG_dirty |
1 << PG_reclaim |
1 << PG_slab |
Index: linux-2.6-git/mm/hugetlb.c
===================================================================
--- linux-2.6-git.orig/mm/hugetlb.c
+++ linux-2.6-git/mm/hugetlb.c
@@ -153,7 +153,8 @@ static void update_and_free_page(struct
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_reclaim2 |
- 1 << PG_reserved | 1 << PG_private | 1<< PG_writeback);
+ 1 << PG_reclaim3 | 1 << PG_reserved | 1 << PG_private |
+ 1<< PG_writeback);
set_page_count(&page[i], 0);
}
set_page_count(page, 1);
-
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