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authorNadia Derbey <Nadia.Derbey@bull.net>2008-09-02 17:35:59 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2008-09-02 22:21:39 -0400
commit61e55d0576d0e7eb4fecaeb25b3618e035de5be1 (patch)
tree67e5d5b779e9c229d4a3af919e821b619ee314b1
parentb954185214c3b562c3fcc651e9ec69d421d76bfa (diff)
ipc: document the new auto_msgmni proc file
Update Documentation/filesystems/proc.txt: it describes the file auto_msgmni intoduced to enable/disable msgmni automatic recomputing upon memory add/remove (see thread http://lkml.org/lkml/2008/7/4/27). Also added a description for msgmni (this filex is only listed in Documentation/sysctl/kernel.txt). Signed-off-by: Nadia Derbey <Nadia.Derbey@bull.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--Documentation/filesystems/proc.txt19
1 files changed, 19 insertions, 0 deletions
diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt
index 64557821ee59..394eb2cc1c39 100644
--- a/Documentation/filesystems/proc.txt
+++ b/Documentation/filesystems/proc.txt
@@ -1339,6 +1339,25 @@ Enables/Disables the protection of the per-process proc entries "maps" and
1339"smaps". When enabled, the contents of these files are visible only to 1339"smaps". When enabled, the contents of these files are visible only to
1340readers that are allowed to ptrace() the given process. 1340readers that are allowed to ptrace() the given process.
1341 1341
1342msgmni
1343------
1344
1345Maximum number of message queue ids on the system.
1346This value scales to the amount of lowmem. It is automatically recomputed
1347upon memory add/remove or ipc namespace creation/removal.
1348When a value is written into this file, msgmni's value becomes fixed, i.e. it
1349is not recomputed anymore when one of the above events occurs.
1350Use auto_msgmni to change this behavior.
1351
1352auto_msgmni
1353-----------
1354
1355Enables/Disables automatic recomputing of msgmni upon memory add/remove or
1356upon ipc namespace creation/removal (see the msgmni description above).
1357Echoing "1" into this file enables msgmni automatic recomputing.
1358Echoing "0" turns it off.
1359auto_msgmni default value is 1.
1360
1342 1361
13432.4 /proc/sys/vm - The virtual memory subsystem 13622.4 /proc/sys/vm - The virtual memory subsystem
1344----------------------------------------------- 1363-----------------------------------------------