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From: Hugh Dickins <hughd@google.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Petr Holasek <pholasek@redhat.com>,
	Andrea Arcangeli <aarcange@redhat.com>,
	Izik Eidus <izik.eidus@ravellosystems.com>,
	Greg KH <gregkh@linux-foundation.org>,
	linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: [PATCH 2/11] ksm: add sysfs ABI Documentation
Date: Fri, 25 Jan 2013 17:56:57 -0800 (PST)	[thread overview]
Message-ID: <alpine.LNX.2.00.1301251754580.29196@eggly.anvils> (raw)
In-Reply-To: <alpine.LNX.2.00.1301251747590.29196@eggly.anvils>

From: Petr Holasek <pholasek@redhat.com>

This patch adds sysfs documentation for Kernel Samepage Merging (KSM)
including new merge_across_nodes knob.

Signed-off-by: Petr Holasek <pholasek@redhat.com>
Signed-off-by: Hugh Dickins <hughd@google.com>
---
 Documentation/ABI/testing/sysfs-kernel-mm-ksm |   52 ++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 Documentation/ABI/testing/sysfs-kernel-mm-ksm

--- /dev/null	1970-01-01 00:00:00.000000000 +0000
+++ mmotm/Documentation/ABI/testing/sysfs-kernel-mm-ksm	2013-01-25 14:36:50.660205905 -0800
@@ -0,0 +1,52 @@
+What:		/sys/kernel/mm/ksm
+Date:		September 2009
+KernelVersion:	2.6.32
+Contact:	Linux memory management mailing list <linux-mm@kvack.org>
+Description:	Interface for Kernel Samepage Merging (KSM)
+
+What:		/sys/kernel/mm/ksm/full_scans
+What:		/sys/kernel/mm/ksm/pages_shared
+What:		/sys/kernel/mm/ksm/pages_sharing
+What:		/sys/kernel/mm/ksm/pages_to_scan
+What:		/sys/kernel/mm/ksm/pages_unshared
+What:		/sys/kernel/mm/ksm/pages_volatile
+What:		/sys/kernel/mm/ksm/run
+What:		/sys/kernel/mm/ksm/sleep_millisecs
+Date:		September 2009
+Contact:	Linux memory management mailing list <linux-mm@kvack.org>
+Description:	Kernel Samepage Merging daemon sysfs interface
+
+		full_scans: how many times all mergeable areas have been
+		scanned.
+
+		pages_shared: how many shared pages are being used.
+
+		pages_sharing: how many more sites are sharing them i.e. how
+		much saved.
+
+		pages_to_scan: how many present pages to scan before ksmd goes
+		to sleep.
+
+		pages_unshared: how many pages unique but repeatedly checked
+		for merging.
+
+		pages_volatile: how many pages changing too fast to be placed
+		in a tree.
+
+		run: write 0 to disable ksm, read 0 while ksm is disabled.
+			write 1 to run ksm, read 1 while ksm is running.
+			write 2 to disable ksm and unmerge all its pages.
+
+		sleep_millisecs: how many milliseconds ksm should sleep between
+		scans.
+
+		See Documentation/vm/ksm.txt for more information.
+
+What:		/sys/kernel/mm/ksm/merge_across_nodes
+Date:		January 2013
+KernelVersion:	3.9
+Contact:	Linux memory management mailing list <linux-mm@kvack.org>
+Description:	Control merging pages across different NUMA nodes.
+
+		When it is set to 0 only pages from the same node are merged,
+		otherwise pages from all nodes can be merged together (default).

  parent reply	other threads:[~2013-01-26  1:56 UTC|newest]

Thread overview: 69+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-01-26  1:53 [PATCH 0/11] ksm: NUMA trees and page migration Hugh Dickins
2013-01-26  1:54 ` [PATCH 1/11] ksm: allow trees per NUMA node Hugh Dickins
2013-01-27  1:14   ` Simon Jeons
2013-01-27  2:54     ` Hugh Dickins
2013-01-27  3:16       ` Simon Jeons
2013-01-27 21:55         ` Hugh Dickins
2013-01-28 23:03   ` Andrew Morton
2013-01-29  1:17     ` Hugh Dickins
2013-01-28 23:08   ` Andrew Morton
2013-01-29  1:38     ` Hugh Dickins
2013-02-05 16:41   ` Mel Gorman
2013-02-07 23:57     ` Hugh Dickins
2013-01-26  1:56 ` Hugh Dickins [this message]
2013-01-26  1:58 ` [PATCH 3/11] ksm: trivial tidyups Hugh Dickins
2013-01-28 23:11   ` Andrew Morton
2013-01-29  1:44     ` Hugh Dickins
2013-01-26  1:59 ` [PATCH 4/11] ksm: reorganize ksm_check_stable_tree Hugh Dickins
2013-02-05 16:48   ` Mel Gorman
2013-02-08  0:07     ` Hugh Dickins
2013-02-14 11:30       ` Mel Gorman
2013-01-26  2:00 ` [PATCH 5/11] ksm: get_ksm_page locked Hugh Dickins
2013-01-27  2:36   ` Simon Jeons
2013-01-27 22:08     ` Hugh Dickins
2013-01-28  0:36       ` Simon Jeons
2013-01-28  3:35         ` Hugh Dickins
2013-01-27  2:48   ` Simon Jeons
2013-01-27 22:10     ` Hugh Dickins
2013-02-05 17:18   ` Mel Gorman
2013-02-08  0:33     ` Hugh Dickins
2013-02-14 11:34       ` Mel Gorman
2013-01-26  2:01 ` [PATCH 6/11] ksm: remove old stable nodes more thoroughly Hugh Dickins
2013-01-27  4:55   ` Simon Jeons
2013-01-27 23:05     ` Hugh Dickins
2013-01-28  1:42       ` Simon Jeons
2013-01-28  4:14         ` Hugh Dickins
2013-01-28  2:12   ` Simon Jeons
2013-01-28  4:19     ` Hugh Dickins
2013-01-28  6:36   ` Simon Jeons
2013-01-28 23:44   ` Andrew Morton
2013-01-29  2:03     ` Hugh Dickins
2013-02-05 17:55   ` Mel Gorman
2013-02-08 19:33     ` Hugh Dickins
2013-02-14 11:58       ` Mel Gorman
2013-02-14 22:19         ` Hugh Dickins
2013-01-26  2:03 ` [PATCH 7/11] ksm: make KSM page migration possible Hugh Dickins
2013-01-27  5:47   ` Simon Jeons
2013-01-27 23:12     ` Hugh Dickins
2013-01-28  0:41       ` Simon Jeons
2013-01-28  3:44         ` Hugh Dickins
2013-02-05 19:11   ` Mel Gorman
2013-02-08 20:52     ` Hugh Dickins
2013-01-26  2:05 ` [PATCH 8/11] ksm: make !merge_across_nodes migration safe Hugh Dickins
2013-01-27  8:49   ` Simon Jeons
2013-01-27 23:25     ` Hugh Dickins
2013-01-28  3:44   ` Simon Jeons
2013-01-26  2:06 ` [PATCH 9/11] ksm: enable KSM page migration Hugh Dickins
2013-01-26  2:07 ` [PATCH 10/11] mm: remove offlining arg to migrate_pages Hugh Dickins
2013-01-26  2:10 ` [PATCH 11/11] ksm: stop hotremove lockdep warning Hugh Dickins
2013-01-27  6:23   ` Simon Jeons
2013-01-27 23:35     ` Hugh Dickins
2013-02-08 18:45   ` Gerald Schaefer
2013-02-11 22:13     ` Hugh Dickins
2013-01-28 23:54 ` [PATCH 0/11] ksm: NUMA trees and page migration Andrew Morton
2013-01-29  0:49   ` Izik Eidus
2013-01-29  2:26     ` Izik Eidus
2013-01-29 16:51       ` Andrea Arcangeli
2013-01-31  0:05         ` Ric Mason
2013-01-29  1:07   ` Hugh Dickins
2013-01-29 10:45     ` Gleb Natapov

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