From: Stanislav Kinsbursky <skinsbursky@parallels.com>
To: akpm@linux-foundation.org
Cc: Larry.Finger@lwfinger.net, mitsuo.hayasaka.hu@hitachi.com,
nhorman@tuxdriver.com, linux-doc@vger.kernel.org,
catalin.marinas@arm.com, xemul@parallels.com,
will.deacon@arm.com, linux-kernel@vger.kernel.org,
cmetcalf@tilera.com, dhowells@redhat.com, ebiederm@xmission.com,
rob@landley.net, dan@mindstab.net, tglx@linutronix.de,
paulmck@linux.vnet.ibm.com, devel@openvz.org,
mtk.manpages@gmail.com
Subject: [PATCH 4/5] Documentation: update sysctl/kernel.txt
Date: Fri, 26 Oct 2012 15:06:12 +0400 [thread overview]
Message-ID: <20121026110612.17494.95224.stgit@localhost.localdomain> (raw)
In-Reply-To: <20121026110103.17494.28182.stgit@localhost.localdomain>
This patch adds documentation about new "msg_next_id", "sem_next_id" and
"shm_next_id" sysctls.
Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
---
Documentation/sysctl/kernel.txt | 19 +++++++++++++++++++
1 files changed, 19 insertions(+), 0 deletions(-)
diff --git a/Documentation/sysctl/kernel.txt b/Documentation/sysctl/kernel.txt
index 2907ba6..51b953a 100644
--- a/Documentation/sysctl/kernel.txt
+++ b/Documentation/sysctl/kernel.txt
@@ -38,6 +38,7 @@ show up in /proc/sys/kernel:
- l2cr [ PPC only ]
- modprobe ==> Documentation/debugging-modules.txt
- modules_disabled
+- msg_next_id [ sysv ipc ]
- msgmax
- msgmnb
- msgmni
@@ -62,7 +63,9 @@ show up in /proc/sys/kernel:
- rtsig-max
- rtsig-nr
- sem
+- sem_next_id [ sysv ipc ]
- sg-big-buff [ generic SCSI device (sg) ]
+- shm_next_id [ sysv ipc ]
- shm_rmid_forced
- shmall
- shmmax [ sysv ipc ]
@@ -320,6 +323,22 @@ to false.
==============================================================
+msg_next_id, sem_next_id, and shm_next_id:
+
+These three toggles allows to specify desired id for next allocated IPC
+object: message, semaphore or shared memory respectively.
+
+By default they are equal to -1, which means generic allocation logic.
+Possible values to set are in range {0..INT_MAX}.
+
+Notes:
+1) kernel doesn't guarantee, that new object will have desired id. So,
+it's up to userspace, how to handle an object with "wrong" id.
+2) Toggle with non-default value will be set back to -1 by kernel after
+successful IPC object allocation.
+
+==============================================================
+
nmi_watchdog:
Enables/Disables the NMI watchdog on x86 systems. When the value is
next prev parent reply other threads:[~2012-10-26 11:11 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-26 11:05 [RFC PATCH 0/5] IPC: CRIU enhancements update Stanislav Kinsbursky
2012-10-26 11:05 ` [PATCH 1/5] ipc: wrap new sysctls for CRIU inside CONFIG_CHECKPOINT_RESTORE Stanislav Kinsbursky
2012-10-26 11:06 ` [PATCH 2/5] ipc: remove redundant MSG_COPY check Stanislav Kinsbursky
2012-10-26 11:06 ` [PATCH 3/5] test: IPC message queue copy feature test update Stanislav Kinsbursky
2012-10-26 11:06 ` Stanislav Kinsbursky [this message]
2012-10-26 11:06 ` [PATCH 5/5] ipc: cleanup do_msgrcv() aroung MSG_COPY feature Stanislav Kinsbursky
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