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authorChristoph Lameter <clameter@sgi.com>2008-02-04 22:29:19 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-05 09:44:18 -0800
commit3dfa5721f12c3d5a441448086bee156887daa961 (patch)
tree8ace8c3f842f8b626b762bb9d2a9b24d8e3bd130 /mm/vmstat.c
parent5dc331852848a38ca00a2817e5b98a1d0561b116 (diff)
Page allocator: get rid of the list of cold pages
We have repeatedly discussed if the cold pages still have a point. There is one way to join the two lists: Use a single list and put the cold pages at the end and the hot pages at the beginning. That way a single list can serve for both types of allocations. The discussion of the RFC for this and Mel's measurements indicate that there may not be too much of a point left to having separate lists for hot and cold pages (see http://marc.info/?t=119492914200001&r=1&w=2). Signed-off-by: Christoph Lameter <clameter@sgi.com> Cc: Mel Gorman <mel@csn.ul.ie> Cc: Martin Bligh <mbligh@mbligh.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/vmstat.c')
-rw-r--r--mm/vmstat.c30
1 files changed, 12 insertions, 18 deletions
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 9ffc573ceb6e..888668e0b7db 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -337,7 +337,7 @@ void refresh_cpu_vm_stats(int cpu)
* Check if there are pages remaining in this pageset
* if not then there is nothing to expire.
*/
- if (!p->expire || (!p->pcp[0].count && !p->pcp[1].count))
+ if (!p->expire || !p->pcp.count)
continue;
/*
@@ -352,11 +352,8 @@ void refresh_cpu_vm_stats(int cpu)
if (p->expire)
continue;
- if (p->pcp[0].count)
- drain_zone_pages(zone, p->pcp + 0);
-
- if (p->pcp[1].count)
- drain_zone_pages(zone, p->pcp + 1);
+ if (p->pcp.count)
+ drain_zone_pages(zone, &p->pcp);
#endif
}
@@ -693,20 +690,17 @@ static void zoneinfo_show_print(struct seq_file *m, pg_data_t *pgdat,
"\n pagesets");
for_each_online_cpu(i) {
struct per_cpu_pageset *pageset;
- int j;
pageset = zone_pcp(zone, i);
- for (j = 0; j < ARRAY_SIZE(pageset->pcp); j++) {
- seq_printf(m,
- "\n cpu: %i pcp: %i"
- "\n count: %i"
- "\n high: %i"
- "\n batch: %i",
- i, j,
- pageset->pcp[j].count,
- pageset->pcp[j].high,
- pageset->pcp[j].batch);
- }
+ seq_printf(m,
+ "\n cpu: %i"
+ "\n count: %i"
+ "\n high: %i"
+ "\n batch: %i",
+ i,
+ pageset->pcp.count,
+ pageset->pcp.high,
+ pageset->pcp.batch);
#ifdef CONFIG_SMP
seq_printf(m, "\n vm stats threshold: %d",
pageset->stat_threshold);