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Date: Wed, 3 Jun 2015 20:05:41 +0300 From: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com> To: Andrew Morton <akpm@...ux-foundation.org>, Andrea Arcangeli <aarcange@...hat.com>, Hugh Dickins <hughd@...gle.com> Cc: Dave Hansen <dave.hansen@...el.com>, Mel Gorman <mgorman@...e.de>, Rik van Riel <riel@...hat.com>, Vlastimil Babka <vbabka@...e.cz>, Christoph Lameter <cl@...two.org>, Naoya Horiguchi <n-horiguchi@...jp.nec.com>, Steve Capper <steve.capper@...aro.org>, "Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>, Johannes Weiner <hannes@...xchg.org>, Michal Hocko <mhocko@...e.cz>, Jerome Marchand <jmarchan@...hat.com>, Sasha Levin <sasha.levin@...cle.com>, linux-kernel@...r.kernel.org, linux-mm@...ck.org, "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com> Subject: [PATCHv6 10/36] 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@...ux.intel.com> Acked-by: Christoph Lameter <cl@...ux.com> Tested-by: Sasha Levin <sasha.levin@...cle.com> Acked-by: Jerome Marchand <jmarchan@...hat.com> Acked-by: Vlastimil Babka <vbabka@...e.cz> --- include/linux/vm_event_item.h | 4 +++- mm/huge_memory.c | 2 +- mm/vmstat.c | 4 +++- 3 files changed, 7 insertions(+), 3 deletions(-) diff --git a/include/linux/vm_event_item.h b/include/linux/vm_event_item.h index 2b1cef88b827..3261bfe2156a 100644 --- a/include/linux/vm_event_item.h +++ b/include/linux/vm_event_item.h @@ -69,7 +69,9 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT, 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 diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 2374dbb57c44..cdc3a358eb17 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -1986,7 +1986,7 @@ 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 1fd0886a389f..e1c87425fe11 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -821,7 +821,9 @@ 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 -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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