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

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Currently a single atomic variable is used to establish the size of the page
cache in the whole machine.  The zoned VM counters have the same method of
implementation as the nr_pagecache code but also allow the determination of
the pagecache size per zone.

Remove the special implementation for nr_pagecache and make it a zoned counter
named NR_FILE_PAGES.

Updates of the page cache counters are always performed with interrupts off.
We can therefore use the __ variant here.

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>
This commit is contained in:
Christoph Lameter
2006-06-30 01:55:35 -07:00
committed by Linus Torvalds
parent 65ba55f500
commit 347ce434d5
13 changed files with 16 additions and 67 deletions
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include/linux/mmzone.h
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@@ -49,7 +49,7 @@ struct zone_padding {
enum zone_stat_item {
NR_FILE_MAPPED, /* mapped into pagetables.
only modified from process context */
NR_FILE_PAGES,
NR_VM_ZONE_STAT_ITEMS };
struct per_cpu_pages {