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Date:      Tue, 26 Sep 2023 19:42:22 GMT
From:      Jens Schweikhardt <schweikh@FreeBSD.org>
To:        src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org
Subject:   git: e8a7cee67348 - main - Add paragraph about kern.mqueue sysctls and their defaults.
Message-ID:  <202309261942.38QJgM7i016083@gitrepo.freebsd.org>

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The branch main has been updated by schweikh:

URL: https://cgit.FreeBSD.org/src/commit/?id=e8a7cee67348aa954138f32567dac379c746e152

commit e8a7cee67348aa954138f32567dac379c746e152
Author:     Jens Schweikhardt <schweikh@FreeBSD.org>
AuthorDate: 2023-09-26 19:41:29 +0000
Commit:     Jens Schweikhardt <schweikh@FreeBSD.org>
CommitDate: 2023-09-26 19:41:29 +0000

    Add paragraph about kern.mqueue sysctls and their defaults.
---
 lib/libc/sys/mq_open.2 | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/lib/libc/sys/mq_open.2 b/lib/libc/sys/mq_open.2
index e5e7808c9e26..17e290e541ca 100644
--- a/lib/libc/sys/mq_open.2
+++ b/lib/libc/sys/mq_open.2
@@ -35,7 +35,7 @@
 .\" the referee document.  The original Standard can be obtained online at
 .\"	http://www.opengroup.org/unix/online.html.
 .\"
-.Dd September 28, 2019
+.Dd September 26, 2023
 .Dt MQ_OPEN 2
 .Os
 .Sh NAME
@@ -226,6 +226,18 @@ Please see the
 .Xr mqueuefs 5
 man page for instructions on loading the module or compiling the service into
 the kernel.
+.Pp
+The number of queues available, the maximum number of messages per queue
+and the maximum message size are tunable
+.Xr sysctl 8
+parameters.
+Their defaults are as follows.
+.Bl -column kern.mqueue.maxmsgsize integerxxx
+.It Sy "Name	Type	Default"
+.It "kern.mqueue.maxmq	integer	100"
+.It "kern.mqueue.maxmsgsize	integer	16384"
+.It "kern.mqueue.maxmsg	integer	100"
+.El
 .Sh RETURN VALUES
 Upon successful completion, the function returns a message queue
 descriptor; otherwise, the function returns



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