[PATCH] zoned vm counters: conversion of nr_dirty to per zone counter

This makes nr_dirty a per zone counter.  Looping over all processors is
avoided during writeback state determination.

The counter aggregation for nr_dirty had to be undone in the NFS layer since
we summed up the page counts from multiple zones.  Someone more familiar with
NFS should probably review what I have done.

[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>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 15adb435f240..1cc8412ac264 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -53,6 +53,7 @@ enum zone_stat_item {
         NR_FILE_PAGES,
         NR_SLAB,        /* Pages used by slab allocator */
         NR_PAGETABLE,   /* used for pagetables */
+        NR_FILE_DIRTY,
         NR_VM_ZONE_STAT_ITEMS };
 
 struct per_cpu_pages {