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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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3
fs/proc/proc_misc.c
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@ -142,7 +142,8 @@ static int meminfo_read_proc(char *page, char **start, off_t off,
allowed = ((totalram_pages - hugetlb_total_pages())
* sysctl_overcommit_ratio / 100) + total_swap_pages;
cached = get_page_cache_size() - total_swapcache_pages - i.bufferram;
cached = global_page_state(NR_FILE_PAGES) -
total_swapcache_pages - i.bufferram;
if (cached < 0)
cached = 0;