[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, 1 deletions

diff --git a/fs/buffer.c b/fs/buffer.c
index e9994722f4a3..90e52e677209 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -852,7 +852,7 @@ int __set_page_dirty_buffers(struct page *page)
                 write_lock_irq(&mapping->tree_lock);
                 if (page->mapping) {    /* Race with truncate? */
                         if (mapping_cap_account_dirty(mapping))
-                                inc_page_state(nr_dirty);
+                                __inc_zone_page_state(page, NR_FILE_DIRTY);
                         radix_tree_tag_set(&mapping->page_tree,
                                                 page_index(page),
                                                 PAGECACHE_TAG_DIRTY);