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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 <[email protected]>
Cc: Trond Myklebust <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Christoph Lameter 2006-06-30 01:55:35 -07:00 • committed by Linus Torvalds
commit 347ce434d5
13 changed files with 16 additions and 67 deletions
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7
mm/vmstat.c
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@ -20,12 +20,6 @@
*/
DEFINE_PER_CPU(struct page_state, page_states) = {0};
atomic_t nr_pagecache = ATOMIC_INIT(0);
EXPORT_SYMBOL(nr_pagecache);
#ifdef CONFIG_SMP
DEFINE_PER_CPU(long, nr_pagecache_local) = 0;
#endif
static void __get_page_state(struct page_state *ret, int nr, cpumask_t *cpumask)
{
unsigned cpu;
@ -402,6 +396,7 @@ struct seq_operations fragmentation_op = {
static char *vmstat_text[] = {
/* Zoned VM counters */
"nr_mapped",
"nr_file_pages",
/* Page state */
"nr_dirty",