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Subject[PATCH 1/3] mem-hotplug: separate setup_per_cpu_pageset() into separate functions
From: Wu Fengguang <fengguang.wu@intel.com>

No behavior change here.

Move some of setup_per_cpu_pageset() code into a new function
setup_zone_pageset() that will be useful for memory hotplug.

Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Haicheng Li <haicheng.li@linux.intel.com>
Reviewed-by: Andi Kleen <andi.kleen@intel.com>
---
mm/page_alloc.c | 37 ++++++++++++++++++++-----------------
1 files changed, 20 insertions(+), 17 deletions(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index d03c946..3eb7c31 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -3146,31 +3146,34 @@ static void setup_pagelist_highmark(struct per_cpu_pageset *p,
pcp->batch = PAGE_SHIFT * 8;
}

+static __meminit void setup_zone_pageset(struct zone *zone)
+{
+ int cpu;
+
+ zone->pageset = alloc_percpu(struct per_cpu_pageset);
+
+ for_each_possible_cpu(cpu) {
+ struct per_cpu_pageset *pcp = per_cpu_ptr(zone->pageset, cpu);
+
+ setup_pageset(pcp, zone_batchsize(zone));
+
+ if (percpu_pagelist_fraction)
+ setup_pagelist_highmark(pcp,
+ (zone->present_pages /
+ percpu_pagelist_fraction));
+ }
+}
+
/*
* Allocate per cpu pagesets and initialize them.
* Before this call only boot pagesets were available.
- * Boot pagesets will no longer be used by this processorr
- * after setup_per_cpu_pageset().
*/
void __init setup_per_cpu_pageset(void)
{
struct zone *zone;
- int cpu;

- for_each_populated_zone(zone) {
- zone->pageset = alloc_percpu(struct per_cpu_pageset);
-
- for_each_possible_cpu(cpu) {
- struct per_cpu_pageset *pcp = per_cpu_ptr(zone->pageset, cpu);
-
- setup_pageset(pcp, zone_batchsize(zone));
-
- if (percpu_pagelist_fraction)
- setup_pagelist_highmark(pcp,
- (zone->present_pages /
- percpu_pagelist_fraction));
- }
- }
+ for_each_populated_zone(zone)
+ setup_zone_pageset(zone);
}

static noinline __init_refok
--
1.6.0.rc1


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