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Subject[86/89] doc: add the documentation for mpol=local
2.6.31-stable review patch.  If anyone has any objections, please let us know.


From: KOSAKI Motohiro <>

commit 5574169613b40b85d6f4c67208fa4846b897a0a1 upstream.

commit 3f226aa1c (mempolicy: support mpol=local tmpfs mount option) added
new mpol=local mount option. but it didn't add a documentation.

This patch does it.

Signed-off-by: KOSAKI Motohiro <>
Cc: Ravikiran Thirumalai <>
Cc: Christoph Lameter <>
Cc: Mel Gorman <>
Acked-by: Lee Schermerhorn <>
Cc: Hugh Dickins <>
Signed-off-by: Andrew Morton <>
Signed-off-by: Linus Torvalds <>
Signed-off-by: Greg Kroah-Hartman <>

Documentation/filesystems/tmpfs.txt | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)

--- a/Documentation/filesystems/tmpfs.txt
+++ b/Documentation/filesystems/tmpfs.txt
@@ -82,11 +82,13 @@ tmpfs has a mount option to set the NUMA
all files in that instance (if CONFIG_NUMA is enabled) - which can be
adjusted on the fly via 'mount -o remount ...'

-mpol=default prefers to allocate memory from the local node
+mpol=default use the process allocation policy
+ (see set_mempolicy(2))
mpol=prefer:Node prefers to allocate memory from the given Node
mpol=bind:NodeList allocates memory only from nodes in NodeList
mpol=interleave prefers to allocate from each node in turn
mpol=interleave:NodeList allocates from each node of NodeList in turn
+mpol=local prefers to allocate memory from the local node

NodeList format is a comma-separated list of decimal numbers and ranges,
a range being two hyphen-separated decimal numbers, the smallest and
@@ -134,3 +136,5 @@ Author:
Christoph Rohland <>, 1.12.01
Hugh Dickins, 4 June 2007
+ KOSAKI Motohiro, 16 Mar 2010

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