Following patch offers some stats about pageset activity.
Index: linux-2.6/mm/page_alloc.c
===================================================================
--- linux-2.6.orig/mm/page_alloc.c
+++ linux-2.6/mm/page_alloc.c
@@ -720,6 +720,7 @@ static void fastcall free_hot_cold_page(
pset = zone_pcp(zone, get_cpu());
local_irq_save(flags);
__inc_page_state(pgfree);
+ __inc_page_state(pcpfree);
pset->count++;
if (cold) {
pset->cold_count++;
@@ -733,6 +734,7 @@ static void fastcall free_hot_cold_page(
free_pages_bulk(zone, count, &pset->list, 0);
pset->cold_count -= min(count, pset->cold_count);
pset->count -= count;
+ __mod_page_state(pcpspill, count);
}
local_irq_restore(flags);
put_cpu();
@@ -794,8 +796,10 @@ again:
goto failed;
pset->count += count;
pset->cold_count += count;
+ __mod_page_state(pcpfill, count);
}
+ __inc_page_state(pcpalloc);
pset->count--;
if (cold) {
page = list_entry(pset->list.prev, struct page, lru);
@@ -2319,6 +2323,10 @@ static char *vmstat_text[] = {
"pgalloc_dma",
"pgfree",
+ "pcpalloc",
+ "pcpfree",
+ "pcpfill",
+ "pcpspill",
"pgactivate",
"pgdeactivate",
Index: linux-2.6/include/linux/page-flags.h
===================================================================
--- linux-2.6.orig/include/linux/page-flags.h
+++ linux-2.6/include/linux/page-flags.h
@@ -117,6 +117,10 @@ struct page_state {
unsigned long pgalloc_dma;
unsigned long pgfree; /* page freeings */
+ unsigned long pcpalloc; /* pages allocated from pcp lists */
+ unsigned long pcpfree; /* pages freed into pcp lists */
+ unsigned long pcpfill; /* pages allocated into pcp lists */
+ unsigned long pcpspill; /* pages freed from pcp lists */
unsigned long pgactivate; /* pages moved inactive->active */
unsigned long pgdeactivate; /* pages moved active->inactive */
-
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