[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>

2 files changed, 1 insertions, 9 deletions

diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 885cc9727001..e9d80697f555 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -55,6 +55,7 @@ enum zone_stat_item {
         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 60c2e0382ceb..9de2a41c885c 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 @@ struct page_state {
         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);