IPC - Document the new auto_msgmni proc file
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PATCH 1/1 IPC - Document the new auto_msgmni proc file
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[PATCH 01/01]
This patch updates 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).
Applies to 2.6.27-rc1-mm1.
Signed-off-by Nadia Derbey <[email protected]>
--- Documentation/filesystems/proc.txt | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+)
Documentation/filesystems/proc.txt +19 -0
@@ -1339,6 +1339,25 @@ Enables/Disables the protection of the p "smaps". When enabled, the contents of these files are visible only to readers that are allowed to ptrace() the given process. +msgmni +------ + +Maximum number of message queue ids on the system. +This value scales to the amount of lowmem. It is automatically recomputed +upon memory add/remove or ipc namespace creation/removal. +When a value is written into this file, msgmni's value becomes fixed, i.e. it +is not recomputed anymore when one of the above events occurs. +Use auto_msgmni to change this behavior. + +auto_msgmni +----------- + +Enables/Disables automatic recomputing of msgmni upon memory add/remove or +upon ipc namespace creation/removal (see the msgmni description above). +Echoing "1" into this file enables msgmni automatic recomputing. +Echoing "0" turns it off. +auto_msgmni default value is 1. + 2.4 /proc/sys/vm - The virtual memory subsystem -----------------------------------------------