[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/fs-writeback.c b/fs/fs-writeback.c
index 031b27a4bc9a..e5ad10756848 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -464,7 +464,7 @@ void sync_inodes_sb(struct super_block *sb, int wait)
                 .range_start    = 0,
                 .range_end      = LLONG_MAX,
         };
-        unsigned long nr_dirty = read_page_state(nr_dirty);
+        unsigned long nr_dirty = global_page_state(NR_FILE_DIRTY);
         unsigned long nr_unstable = read_page_state(nr_unstable);
 
         wbc.nr_to_write = nr_dirty + nr_unstable +