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authorMatt Whitlock <gentoo@mattwhitlock.name>2021-07-31 17:41:57 -0400
committerWilliam Hubbs <w.d.hubbs@gmail.com>2021-12-22 10:01:14 -0600
commitfd1e4a384af44a8687b3a5369283f80f1cf29d84 (patch)
tree51890d0f27d3585553102c3783f369e62be74328 /man/start-stop-daemon.8
parentdd5a6fa60f619f0db854d51efe8731946d3bfbf5 (diff)
add option for OOM score adjustment
This commit adds a new --oom-score-adj option to start-stop-daemon and supervise-daemon, as well as an equivalent SSD_OOM_SCORE_ADJ environment variable. If either of these are specified (with the command-line option taking precedence), then the specified adjustment value is written to /proc/self/oom_score_adj after forking but prior to exec'ing the daemon (at the time when nice and ionice are applied). Additionally, per a suggestion by Mike Frysinger, the suggested values for the SSD_NICELEVEL, SSD_IONICELEVEL, and SSD_OOM_SCORE_ADJ variables in the example config file are now given as zeros, which are the kernel's default values of these process knobs for the init process at boot. Note that uncommenting any of these zero-valued suggestions will cause SSD/SD to set the corresponding process knob affirmatively to zero, whereas leaving the variable unset (and the equivalent command- line option unspecified) means SSD/SD will not change the corresponding process knob from its inherited value. See: https://github.com/OpenRC/openrc/pull/435#discussion_r688310672 This fixes #435.
Diffstat (limited to 'man/start-stop-daemon.8')
-rw-r--r--man/start-stop-daemon.86
1 files changed, 6 insertions, 0 deletions
diff --git a/man/start-stop-daemon.8 b/man/start-stop-daemon.8
index d5eb5123..e5aa4684 100644
--- a/man/start-stop-daemon.8
+++ b/man/start-stop-daemon.8
@@ -128,6 +128,8 @@ Class can be 0 for none, 1 for real time, 2 for best effort and 3 for idle.
Data can be from 0 to 7 inclusive.
.It Fl N , -nicelevel Ar level
Modifies the scheduling priority of the daemon.
+.It Fl -oom-score-adj Ar adj
+Modifies the OOM score adjustment of the daemon.
.It Fl 1 , -stdout Ar logfile
Redirect the standard output of the process to logfile when started with
.Fl background .
@@ -187,6 +189,10 @@ option takes precedence.
can also set the scheduling priority of the daemon, but the command line
option takes precedence.
.Pp
+.Va SSD_OOM_SCORE_ADJ
+can also set the OOM score adjustment of the daemon, but the command line
+option takes precedence.
+.Pp
.Va SSD_STARTWAIT
As the
.Fl w , -wait option above.