LDP
/
man-pages
mirror of https://github.com/mkerrisk/man-pages
0
1
Fork 0
Code Releases Activity

mq_overview.7: Update queues_max details for Linux 3.14 

And in general rework the text a little.

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Michael Kerrisk 2014-09-26 15:25:07 +02:00
parent 82f92a9e7c
commit 1052e1fbcc
1 changed files with 21 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
man7/mq_overview.7
View File

@ -265,18 +265,36 @@ number of message queues that can be created.
The default value for
.I queues_max
is 256.
The semantics of this limit have changed across kernel versions as follows:
.RS
.IP * 3
Before Linux 3.5,
this limit could be changed to any value in the range 0 to
.RB INT_MAX ;
since Linux 3.5, the ceiling for this limit is 1024
.RB INT_MAX ,
but privileged processes
.RB ( CAP_SYS_RESOURCE )
can exceed the limit.
.IP * 3
Since Linux 3.5, there is a ceiling for this limit of 1024
.RB ( HARD_QUEUESMAX ).
Privileged processes
.RB ( CAP_SYS_RESOURCE )
can exceed the
.I queues_max
limit, but since Linux 3.5, the
limit, but the
.BR HARD_QUEUESMAX
limit is enforced even for privileged processes.
.IP *
Starting with Linux 3.14,
.\" commit f3713fd9cff733d9df83116422d8e4af6e86b2bb
the
.B HARD_QUEUESMAX
ceiling is removed: no ceiling is imposed on the
.IR queues_max
limit, and privileged processes
.RB ( CAP_SYS_RESOURCE )
can exceed the limit.
.RE
.SS Resource limit
The
.B RLIMIT_MSGQUEUE