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authorKirill A. Shutemov <kirill.shutemov@linux.intel.com>2016-01-16 03:52:46 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2016-01-16 04:56:32 +0300
commit122afea9626ab3f717b250a8dd3d5ebf57cdb56c (patch)
treee631f74af5a63210a16d516208d233f315e1297c /mm
parent78ddc53473419073ffb2e91178001e87bc513524 (diff)
downloadlinux-122afea9626ab3f717b250a8dd3d5ebf57cdb56c.tar.xz
mm, vmstats: new THP splitting event
The patch replaces THP_SPLIT with tree events: THP_SPLIT_PAGE, THP_SPLIT_PAGE_FAILED and THP_SPLIT_PMD. It reflects the fact that we are going to be able split PMD without the compound page and that split_huge_page() can fail. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Acked-by: Christoph Lameter <cl@linux.com> Tested-by: Sasha Levin <sasha.levin@oracle.com> Tested-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Acked-by: Jerome Marchand <jmarchan@redhat.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Hugh Dickins <hughd@google.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Rik van Riel <riel@redhat.com> Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Steve Capper <steve.capper@linaro.org> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@suse.cz> Cc: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/huge_memory.c2
-rw-r--r--mm/vmstat.c4
2 files changed, 4 insertions, 2 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 0d70ec056ecc..dafa80aa816d 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -2022,7 +2022,7 @@ int split_huge_page_to_list(struct page *page, struct list_head *list)
BUG_ON(!PageSwapBacked(page));
__split_huge_page(page, anon_vma, list);
- count_vm_event(THP_SPLIT);
+ count_vm_event(THP_SPLIT_PAGE);
BUG_ON(PageCompound(page));
out_unlock:
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 83a003bc3cae..6489086f0753 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -844,7 +844,9 @@ const char * const vmstat_text[] = {
"thp_fault_fallback",
"thp_collapse_alloc",
"thp_collapse_alloc_failed",
- "thp_split",
+ "thp_split_page",
+ "thp_split_page_failed",
+ "thp_split_pmd",
"thp_zero_page_alloc",
"thp_zero_page_alloc_failed",
#endif