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Message-Id: <1457737157-38573-8-git-send-email-kirill.shutemov@linux.intel.com>
Date: Sat, 12 Mar 2016 01:58:59 +0300
From: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
To: Hugh Dickins <hughd@...gle.com>,
Andrea Arcangeli <aarcange@...hat.com>,
Andrew Morton <akpm@...ux-foundation.org>
Cc: Dave Hansen <dave.hansen@...el.com>,
Vlastimil Babka <vbabka@...e.cz>,
Christoph Lameter <cl@...two.org>,
Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
Jerome Marchand <jmarchan@...hat.com>,
Yang Shi <yang.shi@...aro.org>,
Sasha Levin <sasha.levin@...cle.com>,
linux-kernel@...r.kernel.org, linux-mm@...ck.org,
linux-fsdevel@...r.kernel.org,
"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Subject: [PATCHv4 07/25] thp, vmstats: add counters for huge file pages
THP_FILE_ALLOC: how many times huge page was allocated and put page
cache.
THP_FILE_MAPPED: how many times file huge page was mapped.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
---
include/linux/vm_event_item.h | 7 +++++++
mm/memory.c | 1 +
mm/vmstat.c | 2 ++
3 files changed, 10 insertions(+)
diff --git a/include/linux/vm_event_item.h b/include/linux/vm_event_item.h
index ec084321fe09..42604173f122 100644
--- a/include/linux/vm_event_item.h
+++ b/include/linux/vm_event_item.h
@@ -70,6 +70,8 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT,
THP_FAULT_FALLBACK,
THP_COLLAPSE_ALLOC,
THP_COLLAPSE_ALLOC_FAILED,
+ THP_FILE_ALLOC,
+ THP_FILE_MAPPED,
THP_SPLIT_PAGE,
THP_SPLIT_PAGE_FAILED,
THP_DEFERRED_SPLIT_PAGE,
@@ -100,4 +102,9 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT,
NR_VM_EVENT_ITEMS
};
+#ifndef CONFIG_TRANSPARENT_HUGEPAGE
+#define THP_FILE_ALLOC ({ BUILD_BUG(); 0; })
+#define THP_FILE_MAPPED ({ BUILD_BUG(); 0; })
+#endif
+
#endif /* VM_EVENT_ITEM_H_INCLUDED */
diff --git a/mm/memory.c b/mm/memory.c
index 0109db96fdff..f7a73b6cabac 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -2885,6 +2885,7 @@ static int do_set_pmd(struct fault_env *fe, struct page *page)
/* fault is handled */
ret = 0;
+ count_vm_event(THP_FILE_MAPPED);
out:
spin_unlock(fe->ptl);
return ret;
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 943b37f17007..78e94198b35f 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -847,6 +847,8 @@ const char * const vmstat_text[] = {
"thp_fault_fallback",
"thp_collapse_alloc",
"thp_collapse_alloc_failed",
+ "thp_file_alloc",
+ "thp_file_mapped",
"thp_split_page",
"thp_split_page_failed",
"thp_deferred_split_page",
--
2.7.0
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