[Suspend2][ 02/20] [Suspend2] Get number of pcp pages.

[Nigel Cunningham <nigel@suspend2.net>]

Return the number of pages currently in the pcp lists.

Signed-off-by: Nigel Cunningham <nigel@suspend2.net>

 kernel/power/prepare_image.c |   33 +++++++++++++++++++++++++++++++++
 1 files changed, 33 insertions(+), 0 deletions(-)

diff --git a/kernel/power/prepare_image.c b/kernel/power/prepare_image.c
index 9e13418..9f6e96d 100644
--- a/kernel/power/prepare_image.c
+++ b/kernel/power/prepare_image.c
@@ -40,3 +40,36 @@ static long storage_allocated = 0;
 static long storage_available = 0;
 long extra_pd1_pages_allowance = MIN_EXTRA_PAGES_ALLOWANCE;
 
+/*
+ * num_pcp_pages: Count pcp pages.
+ */
+static long num_pcp_pages(void)
+{
+	struct zone *zone;
+	long result = 0, i = 0;
+
+	/* PCP lists */
+	for_each_zone(zone) {
+		struct per_cpu_pageset *pset;
+		int cpu;
+		
+		if (!zone->present_pages)
+			continue;
+		
+		for (cpu = 0; cpu < NR_CPUS; cpu++) {
+			if (!cpu_possible(cpu))
+				continue;
+
+			pset = zone_pcp(zone, cpu);
+
+			for (i = 0; i < ARRAY_SIZE(pset->pcp); i++) {
+				struct per_cpu_pages *pcp;
+
+				pcp = &(pset->pcp[i]);
+				result += pcp->count;
+			}
+		}
+	}
+	return result;
+}
+

--
Nigel Cunningham		nigel at suspend2 dot net