From fa5b526411bb5afe7736ce14bab18c0b68db4251 Mon Sep 17 00:00:00 2001 From: Stephen Kitt Date: Tue, 18 Feb 2020 13:59:19 +0100 Subject: [PATCH] docs: add missing IPC documentation in sysctl/kernel.rst This adds short descriptions of msgmax, msgmnb, msgmni, and shmmni, which were previously listed in kernel.rst but not described. Signed-off-by: Stephen Kitt Signed-off-by: Jonathan Corbet --- Documentation/admin-guide/sysctl/kernel.rst | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/Documentation/admin-guide/sysctl/kernel.rst b/Documentation/admin-guide/sysctl/kernel.rst index 99569a2..0ae5215 100644 --- a/Documentation/admin-guide/sysctl/kernel.rst +++ b/Documentation/admin-guide/sysctl/kernel.rst @@ -410,6 +410,15 @@ to false. Generally used with the `kexec_load_disabled`_ toggle. msgmax, msgmnb, and msgmni ========================== +``msgmax`` is the maximum size of an IPC message, in bytes. 8192 by +default (``MSGMAX``). + +``msgmnb`` is the maximum size of an IPC queue, in bytes. 16384 by +default (``MSGMNB``). + +``msgmni`` is the maximum number of IPC queues. 32000 by default +(``MSGMNI``). + msg_next_id, sem_next_id, and shm_next_id (System V IPC) ======================================================== @@ -958,6 +967,9 @@ kernel. This value defaults to ``SHMMAX``. shmmni ====== +This value determines the maximum number of shared memory segments. +4096 by default (``SHMMNI``). + shm_rmid_forced =============== -- 2.7.4