Add support for compound pages so that

inc_xxxx and dec_xxx

will increment the ZVCs by the number of pages of the compound page.

Signed-off-by: Christoph Lameter <[EMAIL PROTECTED]>

---
 include/linux/vmstat.h |    5 ++---
 mm/vmstat.c            |   18 +++++++++++++-----
 2 files changed, 15 insertions(+), 8 deletions(-)

Index: vps/include/linux/vmstat.h
===================================================================
--- vps.orig/include/linux/vmstat.h     2007-06-11 15:56:37.000000000 -0700
+++ vps/include/linux/vmstat.h  2007-06-12 19:06:32.000000000 -0700
@@ -234,7 +234,7 @@ static inline void __inc_zone_state(stru
 static inline void __inc_zone_page_state(struct page *page,
                        enum zone_stat_item item)
 {
-       __inc_zone_state(page_zone(page), item);
+       __mod_zone_page_state(page_zone(page), item, compound_pages(page));
 }
 
 static inline void __dec_zone_state(struct zone *zone, enum zone_stat_item 
item)
@@ -246,8 +246,7 @@ static inline void __dec_zone_state(stru
 static inline void __dec_zone_page_state(struct page *page,
                        enum zone_stat_item item)
 {
-       atomic_long_dec(&page_zone(page)->vm_stat[item]);
-       atomic_long_dec(&vm_stat[item]);
+       __mod_zone_page_state(page_zone(page), item, -compound_pages(page));
 }
 
 /*
Index: vps/mm/vmstat.c
===================================================================
--- vps.orig/mm/vmstat.c        2007-06-11 15:56:37.000000000 -0700
+++ vps/mm/vmstat.c     2007-06-12 19:06:32.000000000 -0700
@@ -225,7 +225,12 @@ void __inc_zone_state(struct zone *zone,
 
 void __inc_zone_page_state(struct page *page, enum zone_stat_item item)
 {
-       __inc_zone_state(page_zone(page), item);
+       struct zone *z = page_zone(page);
+
+       if (likely(!PageHead(page)))
+               __inc_zone_state(z, item);
+       else
+               __mod_zone_page_state(z, item, compound_pages(page));
 }
 EXPORT_SYMBOL(__inc_zone_page_state);
 
@@ -246,7 +251,12 @@ void __dec_zone_state(struct zone *zone,
 
 void __dec_zone_page_state(struct page *page, enum zone_stat_item item)
 {
-       __dec_zone_state(page_zone(page), item);
+       struct zone *z = page_zone(page);
+
+       if (likely(!PageHead(page)))
+               __dec_zone_state(z, item);
+       else
+               __mod_zone_page_state(z, item, -compound_pages(page));
 }
 EXPORT_SYMBOL(__dec_zone_page_state);
 
@@ -262,11 +272,9 @@ void inc_zone_state(struct zone *zone, e
 void inc_zone_page_state(struct page *page, enum zone_stat_item item)
 {
        unsigned long flags;
-       struct zone *zone;
 
-       zone = page_zone(page);
        local_irq_save(flags);
-       __inc_zone_state(zone, item);
+       __inc_zone_page_state(page, item);
        local_irq_restore(flags);
 }
 EXPORT_SYMBOL(inc_zone_page_state);

-- 
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Reply via email to