https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=219055
Bug ID: 219055
Summary: nice jail anomoly - values not passed into jailed
processes when using jexec -U username
Product: Base System
Version: 11.0-STABLE
Hardware: Any
OS: Any
Status: New
Severity: Affects Some People
Priority: ---
Component: bin
Assignee: freebsd-bugs@FreeBSD.org
Reporter: dewa...@heuristicsystems.com.au
While trying to find a "nice" way to adjust the process priority within a jail,
I noticed that setting the username of the executing software within a jail -
didn't adopt the required niceness. Please note the NI value below. The first
example is what I would expect with the other options.
# nice -n -11 jexec b2 ps -l
UID PID PPID CPU PRI NI VSZ RSS MWCHAN STAT TT TIME COMMAND
0 7264 47997 0 61 -11 21140 2560 - R<+J 2 0:00.00 ps -l
# nice -n -11 jexec -U root b2 ps -l
UID PID PPID CPU PRI NI VSZ RSS MWCHAN STAT TT TIME COMMAND
0 11134 47997 0 72 0 21140 2556 - R+J 2 0:00.00 ps -l
# nice -n -11 jexec -u root b2 ps -l
UID PID PPID CPU PRI NI VSZ RSS MWCHAN STAT TT TIME COMMAND
0 13759 47997 0 72 0 16660 4532 - R+J 2 0:00.00 ps -l
The intent is to run a process within a jail by a specific username at a
specified priority.
A workaround could be to define a class within login.conf. But... this forces
all processes with that username to run at that priority, which is undesirable.
Interestingly I do run longstanding processes at idle and they do acquire the
"nice" value (please note the PRI value) below:
# idprio 0 jexec -U root b6 ps -l
UID PID PPID CPU PRI NI VSZ RSS MWCHAN STAT TT TIME COMMAND
0 49946 48878 0 124 0 21140 2548 - R+J 2 0:00.00 ps -l
# idprio 24 jexec -U root b6 ps -l
UID PID PPID CPU PRI NI VSZ RSS MWCHAN STAT TT TIME COMMAND
0 51714 48878 0 148 0 21140 2548 - R+J 2 0:00.00 ps -l
It looks like the nice value via /bin/sh (nor bin/tcsh) isn't passed via jexec
to the jailed process.
--
You are receiving this mail because:
You are the assignee for the bug.
_______________________________________________
freebsd-bugs@freebsd.org mailing list
https://lists.freebsd.org/mailman/listinfo/freebsd-bugs
To unsubscribe, send any mail to "freebsd-bugs-unsubscr...@freebsd.org"
