[PATCH] zoned vm counters: conversion of nr_writeback to per zone counter
Conversion of nr_writeback to per zone counter.
This removes the last page_state counter from arch/i386/mm/pgtable.c so we
drop the page_state from there.
[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>
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 1cc8412..885cc97 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -54,6 +54,7 @@
NR_SLAB, /* Pages used by slab allocator */
NR_PAGETABLE, /* used for pagetables */
NR_FILE_DIRTY,
+ NR_WRITEBACK,
NR_VM_ZONE_STAT_ITEMS };
struct per_cpu_pages {
diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h
index ff235c4..5748642 100644
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h
@@ -181,7 +181,7 @@
do { \
if (!test_and_set_bit(PG_writeback, \
&(page)->flags)) \
- inc_page_state(nr_writeback); \
+ inc_zone_page_state(page, NR_WRITEBACK); \
} while (0)
#define TestSetPageWriteback(page) \
({ \
@@ -189,14 +189,14 @@
ret = test_and_set_bit(PG_writeback, \
&(page)->flags); \
if (!ret) \
- inc_page_state(nr_writeback); \
+ inc_zone_page_state(page, NR_WRITEBACK); \
ret; \
})
#define ClearPageWriteback(page) \
do { \
if (test_and_clear_bit(PG_writeback, \
&(page)->flags)) \
- dec_page_state(nr_writeback); \
+ dec_zone_page_state(page, NR_WRITEBACK); \
} while (0)
#define TestClearPageWriteback(page) \
({ \
@@ -204,7 +204,7 @@
ret = test_and_clear_bit(PG_writeback, \
&(page)->flags); \
if (ret) \
- dec_page_state(nr_writeback); \
+ dec_zone_page_state(page, NR_WRITEBACK); \
ret; \
})
diff --git a/include/linux/vmstat.h b/include/linux/vmstat.h
index b323ea2..60c2e03 100644
--- a/include/linux/vmstat.h
+++ b/include/linux/vmstat.h
@@ -22,7 +22,6 @@
* commented here.
*/
struct page_state {
- unsigned long nr_writeback; /* Pages under writeback */
unsigned long nr_unstable; /* NFS unstable pages */
#define GET_PAGE_STATE_LAST nr_unstable