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From: "Huang, Ying" <ying.huang@intel.com>
To: Andrew Morton <akpm@linux-foundation.org>,
	Jonathan Corbet <corbet@lwn.net>
Cc: linux-mm@kvack.org, linux-doc@vger.kernel.org,
	linux-kernel@vger.kernel.org, Huang Ying <ying.huang@intel.com>,
	"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
	Andrea Arcangeli <aarcange@redhat.com>,
	Johannes Weiner <hannes@cmpxchg.org>
Subject: [PATCH -mm] mm, THP, doc: Add document for thp_swpout/thp_swpout_fallback
Date: Wed,  9 May 2018 16:23:41 +0800	[thread overview]
Message-ID: <20180509082341.13953-1-ying.huang@intel.com> (raw)

From: Huang Ying <ying.huang@intel.com>

Add document for newly added thp_swpout, thp_swpout_fallback fields in
/proc/vmstat.

Signed-off-by: "Huang, Ying" <ying.huang@intel.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
---
 Documentation/vm/transhuge.rst | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/Documentation/vm/transhuge.rst b/Documentation/vm/transhuge.rst
index 569d182cc973..2c6867fca6ff 100644
--- a/Documentation/vm/transhuge.rst
+++ b/Documentation/vm/transhuge.rst
@@ -355,6 +355,15 @@ thp_zero_page_alloc_failed
 	is incremented if kernel fails to allocate
 	huge zero page and falls back to using small pages.
 
+thp_swpout
+	is incremented every time a huge page is swapout in one
+	piece without splitting.
+
+thp_swpout_fallback
+	is incremented if a huge page has to be split before swapout.
+	Usually because failed to allocate some continuous swap space
+	for the huge page.
+
 As the system ages, allocating huge pages may be expensive as the
 system uses memory compaction to copy data around memory to free a
 huge page for use. There are some counters in ``/proc/vmstat`` to help
-- 
2.16.1

WARNING: multiple messages have this Message-ID (diff)
From: "Huang, Ying" <ying.huang@intel.com>
To: Andrew Morton <akpm@linux-foundation.org>,
	Jonathan Corbet <corbet@lwn.net>
Cc: linux-mm@kvack.org, linux-doc@vger.kernel.org,
	linux-kernel@vger.kernel.org, Huang Ying <ying.huang@intel.com>,
	"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
	Andrea Arcangeli <aarcange@redhat.com>,
	Johannes Weiner <hannes@cmpxchg.org>
Subject: [PATCH -mm] mm, THP, doc: Add document for thp_swpout/thp_swpout_fallback
Date: Wed,  9 May 2018 16:23:41 +0800	[thread overview]
Message-ID: <20180509082341.13953-1-ying.huang@intel.com> (raw)

From: Huang Ying <ying.huang@intel.com>

Add document for newly added thp_swpout, thp_swpout_fallback fields in
/proc/vmstat.

Signed-off-by: "Huang, Ying" <ying.huang@intel.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
---
 Documentation/vm/transhuge.rst | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/Documentation/vm/transhuge.rst b/Documentation/vm/transhuge.rst
index 569d182cc973..2c6867fca6ff 100644
--- a/Documentation/vm/transhuge.rst
+++ b/Documentation/vm/transhuge.rst
@@ -355,6 +355,15 @@ thp_zero_page_alloc_failed
 	is incremented if kernel fails to allocate
 	huge zero page and falls back to using small pages.
 
+thp_swpout
+	is incremented every time a huge page is swapout in one
+	piece without splitting.
+
+thp_swpout_fallback
+	is incremented if a huge page has to be split before swapout.
+	Usually because failed to allocate some continuous swap space
+	for the huge page.
+
 As the system ages, allocating huge pages may be expensive as the
 system uses memory compaction to copy data around memory to free a
 huge page for use. There are some counters in ``/proc/vmstat`` to help
-- 
2.16.1

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             reply	other threads:[~2018-05-09  8:24 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-09  8:23 Huang, Ying [this message]
2018-05-09  8:23 ` [PATCH -mm] mm, THP, doc: Add document for thp_swpout/thp_swpout_fallback Huang, Ying
2018-05-10 20:06 ` Jonathan Corbet
2018-05-10 20:06   ` Jonathan Corbet

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