git: e8a7cee67348 - main - Add paragraph about kern.mqueue sysctls and their defaults.
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Date: Tue, 26 Sep 2023 19:42:22 UTC
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