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From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
To: Andrew Morton <akpm@linux-foundation.org>,
	Andrea Arcangeli <aarcange@redhat.com>,
	linux-mm@kvack.org
Cc: Andi Kleen <ak@linux.intel.com>,
	"H. Peter Anvin" <hpa@linux.intel.com>,
	linux-kernel@vger.kernel.org,
	"Kirill A. Shutemov" <kirill@shutemov.name>,
	"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Subject: [PATCH] thp, vmstat: implement HZP_ALLOC and HZP_ALLOC_FAILED events
Date: Fri, 26 Oct 2012 18:14:02 +0300	[thread overview]
Message-ID: <1351264442-4730-1-git-send-email-kirill.shutemov@linux.intel.com> (raw)
In-Reply-To: <1350280859-18801-1-git-send-email-kirill.shutemov@linux.intel.com>

From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>

HZP_ALLOC event triggers on every huge zero page allocation, including
allocations which where dropped due race with other allocation.

HZP_ALLOC_FAILED event triggers on huge zero page allocation fail
(ENOMEM).

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
---
 include/linux/vm_event_item.h |    2 ++
 mm/huge_memory.c              |    5 ++++-
 mm/vmstat.c                   |    2 ++
 3 files changed, 8 insertions(+), 1 deletions(-)

diff --git a/include/linux/vm_event_item.h b/include/linux/vm_event_item.h
index 3d31145..d7156fb 100644
--- a/include/linux/vm_event_item.h
+++ b/include/linux/vm_event_item.h
@@ -58,6 +58,8 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT,
 		THP_COLLAPSE_ALLOC,
 		THP_COLLAPSE_ALLOC_FAILED,
 		THP_SPLIT,
+		HZP_ALLOC,
+		HZP_ALLOC_FAILED,
 #endif
 		NR_VM_EVENT_ITEMS
 };
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 92a1b66..492658a 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -183,8 +183,11 @@ retry:
 
 	zero_page = alloc_pages((GFP_TRANSHUGE | __GFP_ZERO) & ~__GFP_MOVABLE,
 			HPAGE_PMD_ORDER);
-	if (!zero_page)
+	if (!zero_page) {
+		count_vm_event(HZP_ALLOC_FAILED);
 		return 0;
+	}
+	count_vm_event(HZP_ALLOC);
 	preempt_disable();
 	if (cmpxchg(&huge_zero_pfn, 0, page_to_pfn(zero_page))) {
 		preempt_enable();
diff --git a/mm/vmstat.c b/mm/vmstat.c
index c737057..cb8901c 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -801,6 +801,8 @@ const char * const vmstat_text[] = {
 	"thp_collapse_alloc",
 	"thp_collapse_alloc_failed",
 	"thp_split",
+	"hzp_alloc",
+	"hzp_alloc_failed",
 #endif
 
 #endif /* CONFIG_VM_EVENTS_COUNTERS */
-- 
1.7.7.6


      parent reply	other threads:[~2012-10-26 15:23 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-10-15  6:00 [PATCH v4 00/10, REBASED] Introduce huge zero page Kirill A. Shutemov
2012-10-15  6:00 ` [PATCH v4 01/10] thp: huge zero page: basic preparation Kirill A. Shutemov
2012-10-15  6:00 ` [PATCH v4 02/10] thp: zap_huge_pmd(): zap huge zero pmd Kirill A. Shutemov
2012-10-15  6:00 ` [PATCH v4 03/10] thp: copy_huge_pmd(): copy huge zero page Kirill A. Shutemov
2012-10-15  6:00 ` [PATCH v4 04/10] thp: do_huge_pmd_wp_page(): handle " Kirill A. Shutemov
2012-10-15  6:00 ` [PATCH v4 05/10] thp: change_huge_pmd(): keep huge zero page write-protected Kirill A. Shutemov
2012-10-15  6:00 ` [PATCH v4 06/10] thp: change split_huge_page_pmd() interface Kirill A. Shutemov
2012-10-15  6:00 ` [PATCH v4 07/10] thp: implement splitting pmd for huge zero page Kirill A. Shutemov
2012-10-15  6:00 ` [PATCH v4 08/10] thp: setup huge zero page on non-write page fault Kirill A. Shutemov
2012-10-15  6:00 ` [PATCH v4 09/10] thp: lazy huge zero page allocation Kirill A. Shutemov
2012-10-15  6:00 ` [PATCH v4 10/10] thp: implement refcounting for huge zero page Kirill A. Shutemov
2012-10-18 23:45   ` Andrew Morton
2012-10-18 23:59     ` Kirill A. Shutemov
2012-10-23  6:35       ` Kirill A. Shutemov
2012-10-23  6:43         ` Andrew Morton
2012-10-23  7:00           ` Kirill A. Shutemov
2012-10-23 22:59             ` Andrew Morton
2012-10-23 23:38               ` Kirill A. Shutemov
2012-10-24 19:22                 ` Andrew Morton
2012-10-24 19:45                   ` Kirill A. Shutemov
2012-10-24 20:25                     ` Andrew Morton
2012-10-24 20:33                       ` Kirill A. Shutemov
2012-10-24 20:44                         ` Andi Kleen
2012-10-25 20:49                       ` Kirill A. Shutemov
2012-10-25 21:05                         ` Andrew Morton
2012-10-25 21:22                           ` Kirill A. Shutemov
2012-10-25 21:37                             ` Andrew Morton
2012-10-25 22:10                               ` Kirill A. Shutemov
2012-10-16  9:53 ` [PATCH v4 00/10, REBASED] Introduce " Ni zhan Chen
2012-10-16 10:54   ` Kirill A. Shutemov
2012-10-16 11:13     ` Ni zhan Chen
2012-10-16 11:28       ` Kirill A. Shutemov
2012-10-16 11:37         ` Ni zhan Chen
2012-10-26 15:14 ` Kirill A. Shutemov [this message]

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