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authorAdam Litke <agl@us.ibm.com>2008-04-28 02:13:06 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-04-28 08:58:23 -0700
commit3b1163006332302117b1b2acf226d4014ff46525 (patch)
treec9e43179620cfe612ce57795cb0b1e1ceb2c9d1b /mm/vmstat.c
parent122c7a59055c77434118d7dd4dff4b625d4a2c15 (diff)
downloadvexpress-lsk-3b1163006332302117b1b2acf226d4014ff46525.tar.gz
Subject: [PATCH] hugetlb: vmstat events for huge page allocations
Allocating huge pages directly from the buddy allocator is not guaranteed to succeed. Success depends on several factors (such as the amount of physical memory available and the level of fragmentation). With the addition of dynamic hugetlb pool resizing, allocations can occur much more frequently. For these reasons it is desirable to keep track of huge page allocation successes and failures. Add two new vmstat entries to track huge page allocations that succeed and fail. The presence of the two entries is contingent upon CONFIG_HUGETLB_PAGE being enabled. [akpm@linux-foundation.org: reduced ifdeffery] Signed-off-by: Adam Litke <agl@us.ibm.com> Signed-off-by: Eric Munson <ebmunson@us.ibm.com> Tested-by: Mel Gorman <mel@csn.ul.ie> Reviewed-by: Andy Whitcroft <apw@shadowen.org> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> 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.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 879bcc0a1d4..4c21670f8d9 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -645,6 +645,10 @@ static const char * const vmstat_text[] = {
"allocstall",
"pgrotated",
+#ifdef CONFIG_HUGETLB_PAGE
+ "htlb_buddy_alloc_success",
+ "htlb_buddy_alloc_fail",
+#endif
#endif
};