Commit ce866b34 authored by Christoph Lameter's avatar Christoph Lameter Committed by Linus Torvalds
Browse files

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



Conversion of nr_writeback to per zone counter.

This removes the last page_state counter from arch/i386/mm/pgtable.c so we
drop the page_state from there.

[akpm@osdl.org: bugfix]
Signed-off-by: default avatarChristoph Lameter <clameter@sgi.com>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent b1e7a8fd

arch/i386/mm/pgtable.c

+2 −3
Original line number Diff line number Diff line
@@ -30,7 +30,6 @@ void show_mem(void) 
	struct page *page;

	pg_data_t *pgdat;

	unsigned long i;

	struct page_state ps;

	unsigned long flags;



	printk(KERN_INFO "Mem-info:\n");
@@ -58,9 +57,9 @@ void show_mem(void) 
	printk(KERN_INFO "%d pages shared\n", shared);

	printk(KERN_INFO "%d pages swap cached\n", cached);



	get_page_state(&ps);

	printk(KERN_INFO "%lu pages dirty\n", global_page_state(NR_FILE_DIRTY));

	printk(KERN_INFO "%lu pages writeback\n", ps.nr_writeback);

	printk(KERN_INFO "%lu pages writeback\n",

					global_page_state(NR_WRITEBACK));

	printk(KERN_INFO "%lu pages mapped\n", global_page_state(NR_FILE_MAPPED));

	printk(KERN_INFO "%lu pages slab\n", global_page_state(NR_SLAB));

	printk(KERN_INFO "%lu pages pagetables\n",

drivers/base/node.c

+1 −4
Original line number Diff line number Diff line
@@ -49,9 +49,6 @@ static ssize_t node_read_meminfo(struct sys_device * dev, char * buf) 
	get_page_state_node(&ps, nid);

	__get_zone_counts(&active, &inactive, &free, NODE_DATA(nid));



	/* Check for negative values in these approximate counters */

	if ((long)ps.nr_writeback < 0)

		ps.nr_writeback = 0;



	n = sprintf(buf, "\n"

		       "Node %d MemTotal:     %8lu kB\n"
@@ -80,7 +77,7 @@ static ssize_t node_read_meminfo(struct sys_device * dev, char * buf) 
		       nid, K(i.totalram - i.totalhigh),

		       nid, K(i.freeram - i.freehigh),

		       nid, K(node_page_state(nid, NR_FILE_DIRTY)),

		       nid, K(ps.nr_writeback),

		       nid, K(node_page_state(nid, NR_WRITEBACK)),

		       nid, K(node_page_state(nid, NR_FILE_PAGES)),

		       nid, K(node_page_state(nid, NR_FILE_MAPPED)),

		       nid, K(node_page_state(nid, NR_ANON_PAGES)),

fs/proc/proc_misc.c

+1 −1
Original line number Diff line number Diff line
@@ -191,7 +191,7 @@ static int meminfo_read_proc(char *page, char **start, off_t off, 
		K(i.totalswap),

		K(i.freeswap),

		K(global_page_state(NR_FILE_DIRTY)),

		K(ps.nr_writeback),

		K(global_page_state(NR_WRITEBACK)),

		K(global_page_state(NR_ANON_PAGES)),

		K(global_page_state(NR_FILE_MAPPED)),

		K(global_page_state(NR_SLAB)),

include/linux/mmzone.h

+1 −0
Original line number Diff line number Diff line
@@ -54,6 +54,7 @@ enum zone_stat_item { 
	NR_SLAB,	/* Pages used by slab allocator */

	NR_PAGETABLE,	/* used for pagetables */

	NR_FILE_DIRTY,

	NR_WRITEBACK,

	NR_VM_ZONE_STAT_ITEMS };



struct per_cpu_pages {

include/linux/page-flags.h

+4 −4
Original line number Diff line number Diff line
@@ -181,7 +181,7 @@ 
	do {								\

		if (!test_and_set_bit(PG_writeback,			\

				&(page)->flags))			\

			inc_page_state(nr_writeback);			\

			inc_zone_page_state(page, NR_WRITEBACK);	\

	} while (0)

#define TestSetPageWriteback(page)					\

	({								\
@@ -189,14 +189,14 @@ 
		ret = test_and_set_bit(PG_writeback,			\

					&(page)->flags);		\

		if (!ret)						\

			inc_page_state(nr_writeback);			\

			inc_zone_page_state(page, NR_WRITEBACK);	\

		ret;							\

	})

#define ClearPageWriteback(page)					\

	do {								\

		if (test_and_clear_bit(PG_writeback,			\

				&(page)->flags))			\

			dec_page_state(nr_writeback);			\

			dec_zone_page_state(page, NR_WRITEBACK);	\

	} while (0)

#define TestClearPageWriteback(page)					\

	({								\
@@ -204,7 +204,7 @@ 
		ret = test_and_clear_bit(PG_writeback,			\

				&(page)->flags);			\

		if (ret)						\

			dec_page_state(nr_writeback);			\

			dec_zone_page_state(page, NR_WRITEBACK);	\

		ret;							\

	})

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