From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934263AbbCDQi0 (ORCPT ); Wed, 4 Mar 2015 11:38:26 -0500 Received: from mga11.intel.com ([192.55.52.93]:63037 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933744AbbCDQda (ORCPT ); Wed, 4 Mar 2015 11:33:30 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.09,688,1418112000"; d="scan'208";a="660394751" From: "Kirill A. Shutemov" To: Andrew Morton , Andrea Arcangeli Cc: Dave Hansen , Hugh Dickins , Mel Gorman , Rik van Riel , Vlastimil Babka , Christoph Lameter , Naoya Horiguchi , Steve Capper , "Aneesh Kumar K.V" , Johannes Weiner , Michal Hocko , Jerome Marchand , linux-kernel@vger.kernel.org, linux-mm@kvack.org, "Kirill A. Shutemov" Subject: [PATCHv4 13/24] mm, vmstats: new THP splitting event Date: Wed, 4 Mar 2015 18:33:01 +0200 Message-Id: <1425486792-93161-14-git-send-email-kirill.shutemov@linux.intel.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1425486792-93161-1-git-send-email-kirill.shutemov@linux.intel.com> References: <1425486792-93161-1-git-send-email-kirill.shutemov@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The patch replaces THP_SPLIT with tree events: THP_SPLIT_PAGE, THP_SPLIT_PAGE_FAILT and THP_SPLIT_PMD. It reflects the fact that we now can split PMD without the compound page and that split_huge_page() can fail. Signed-off-by: Kirill A. Shutemov --- include/linux/vm_event_item.h | 4 +++- mm/huge_memory.c | 3 +++ mm/vmstat.c | 4 +++- 3 files changed, 9 insertions(+), 2 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 f420847a3288..3409a5c7dbb8 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -1646,6 +1646,8 @@ static void __split_huge_pmd_locked(struct vm_area_struct *vma, VM_BUG_ON_VMA(vma->vm_start > haddr, vma); VM_BUG_ON_VMA(vma->vm_end < haddr + HPAGE_PMD_SIZE, vma); + count_vm_event(THP_SPLIT_PMD); + if (is_huge_zero_pmd(*pmd)) return __split_huge_zero_page_pmd(vma, haddr, pmd); @@ -1922,6 +1924,7 @@ static void __split_huge_page(struct page *page, */ int split_huge_page_to_list(struct page *page, struct list_head *list) { + count_vm_event(THP_SPLIT_PAGE_FAILED); return -EBUSY; } 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