[PATCH] zoned vm counters: conversion of nr_unstable to per zone counter
Conversion of nr_unstable to a per zone counter
We need to do some special modifications to the nfs code since there are
multiple cases of disposition and we need to have a page ref for proper
accounting.
This converts the last critical page state of the VM and therefore we need to
remove several functions that were depending on GET_PAGE_STATE_LAST in order
to make the kernel compile again. We are only left with event type counters
in page state.
[akpm@osdl.org: bugfixes]
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 885cc97..e9d8069 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -55,6 +55,7 @@
NR_PAGETABLE, /* used for pagetables */
NR_FILE_DIRTY,
NR_WRITEBACK,
+ NR_UNSTABLE_NFS, /* NFS unstable pages */
NR_VM_ZONE_STAT_ITEMS };
struct per_cpu_pages {
diff --git a/include/linux/vmstat.h b/include/linux/vmstat.h
index 60c2e03..9de2a41 100644
--- a/include/linux/vmstat.h
+++ b/include/linux/vmstat.h
@@ -22,13 +22,6 @@
* commented here.
*/
struct page_state {
- unsigned long nr_unstable; /* NFS unstable pages */
-#define GET_PAGE_STATE_LAST nr_unstable
-
- /*
- * The below are zeroed by get_page_state(). Use get_full_page_state()
- * to add up all these.
- */
unsigned long pgpgin; /* Disk reads */
unsigned long pgpgout; /* Disk writes */
unsigned long pswpin; /* swap reads */
@@ -77,8 +70,6 @@
unsigned long nr_bounce; /* pages for bounce buffers */
};
-extern void get_page_state(struct page_state *ret);
-extern void get_page_state_node(struct page_state *ret, int node);
extern void get_full_page_state(struct page_state *ret);
extern unsigned long read_page_state_offset(unsigned long offset);
extern void mod_page_state_offset(unsigned long offset, unsigned long delta);
