From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-f53.google.com (mail-pa0-f53.google.com [209.85.220.53]) by kanga.kvack.org (Postfix) with ESMTP id 63BE96B00A4 for ; Mon, 9 Jun 2014 12:05:08 -0400 (EDT) Received: by mail-pa0-f53.google.com with SMTP id kx10so871496pab.26 for ; Mon, 09 Jun 2014 09:05:08 -0700 (PDT) Received: from mga03.intel.com (mga03.intel.com. [143.182.124.21]) by mx.google.com with ESMTP id ia5si31154386pbb.236.2014.06.09.09.05.07 for ; Mon, 09 Jun 2014 09:05:07 -0700 (PDT) From: "Kirill A. Shutemov" Subject: [PATCH, RFC 05/10] mm, vmstats: new THP splitting event Date: Mon, 9 Jun 2014 19:04:16 +0300 Message-Id: <1402329861-7037-6-git-send-email-kirill.shutemov@linux.intel.com> In-Reply-To: <1402329861-7037-1-git-send-email-kirill.shutemov@linux.intel.com> References: <1402329861-7037-1-git-send-email-kirill.shutemov@linux.intel.com> Sender: owner-linux-mm@kvack.org List-ID: To: Andrew Morton , Andrea Arcangeli Cc: Dave Hansen , Hugh Dickins , Mel Gorman , Rik van Riel , Vlastimil Babka , linux-kernel@vger.kernel.org, linux-mm@kvack.org, "Kirill A. Shutemov" 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 | 2 ++ mm/vmstat.c | 4 +++- 3 files changed, 8 insertions(+), 2 deletions(-) diff --git a/include/linux/vm_event_item.h b/include/linux/vm_event_item.h index ced92345c963..b44dffa769b9 100644 --- a/include/linux/vm_event_item.h +++ b/include/linux/vm_event_item.h @@ -68,7 +68,9 @@ 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 752c850f6941..fec89aedcedd 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -1578,6 +1578,7 @@ unlock: int split_huge_page_to_list(struct page *page, struct list_head *list) { + count_vm_event(THP_SPLIT_PAGE_FAILED); return -EBUSY; } @@ -2496,6 +2497,7 @@ void __split_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end); return; } + count_vm_event(THP_SPLIT_PMD); if (is_huge_zero_pmd(*pmd)) { __split_huge_zero_page_pmd(vma, haddr, pmd); spin_unlock(ptl); diff --git a/mm/vmstat.c b/mm/vmstat.c index b37bd49bfd55..6a155f0476e8 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -855,7 +855,9 @@ 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 -- 2.0.0.rc4 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org