From 122afea9626ab3f717b250a8dd3d5ebf57cdb56c Mon Sep 17 00:00:00 2001 From: "Kirill A. Shutemov" Date: Fri, 15 Jan 2016 16:52:46 -0800 Subject: 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 Acked-by: Christoph Lameter Tested-by: Sasha Levin Tested-by: Aneesh Kumar K.V Acked-by: Jerome Marchand Acked-by: Vlastimil Babka Cc: Andrea Arcangeli Cc: Hugh Dickins Cc: Dave Hansen Cc: Mel Gorman Cc: Rik van Riel Cc: Naoya Horiguchi Cc: Steve Capper Cc: Johannes Weiner Cc: Michal Hocko Cc: David Rientjes Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/huge_memory.c | 2 +- mm/vmstat.c | 4 +++- 2 files changed, 4 insertions(+), 2 deletions(-) (limited to 'mm') 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 -- cgit v1.2.3