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authorShaohua Li <shaohua.li@intel.com>2009-09-21 17:01:16 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-09-22 07:17:25 -0700
commit112067f0905b2de862c607ee62411cf47d2fe5c4 (patch)
tree55575b100292b764f945e4d9395989e8a734f883 /mm/page_alloc.c
parent478b81fd84a299adb401dbbae296f3767e552999 (diff)
downloadconfigs-112067f0905b2de862c607ee62411cf47d2fe5c4.tar.gz
memory hotplug: update zone pcp at memory online
In my test, 128M memory is hot added, but zone's pcp batch is 0, which is an obvious error. When pages are onlined, zone pcp should be updated accordingly. [akpm@linux-foundation.org: fix warnings] Signed-off-by: Shaohua Li <shaohua.li@intel.com> Cc: Mel Gorman <mel@csn.ul.ie> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Yakui Zhao <yakui.zhao@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/page_alloc.c')
-rw-r--r--mm/page_alloc.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index f4e929e356d..1a3a893ef50 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -3142,6 +3142,32 @@ int zone_wait_table_init(struct zone *zone, unsigned long zone_size_pages)
return 0;
}
+static int __zone_pcp_update(void *data)
+{
+ struct zone *zone = data;
+ int cpu;
+ unsigned long batch = zone_batchsize(zone), flags;
+
+ for (cpu = 0; cpu < NR_CPUS; cpu++) {
+ struct per_cpu_pageset *pset;
+ struct per_cpu_pages *pcp;
+
+ pset = zone_pcp(zone, cpu);
+ pcp = &pset->pcp;
+
+ local_irq_save(flags);
+ free_pages_bulk(zone, pcp->count, &pcp->list, 0);
+ setup_pageset(pset, batch);
+ local_irq_restore(flags);
+ }
+ return 0;
+}
+
+void zone_pcp_update(struct zone *zone)
+{
+ stop_machine(__zone_pcp_update, zone, NULL);
+}
+
static __meminit void zone_pcp_init(struct zone *zone)
{
int cpu;