Merge pull request #12226 from poettering/22bit-pids

sysctl: let's by default increase the numeric PID range from 2^16 to …

Author: poettering

TODO

@@ -898,8 +898,6 @@ Features:
 
 * support crash reporting operation modes (https://live.gnome.org/GnomeOS/Design/Whiteboards/ProblemReporting)
 
-* default to actual 32-bit PIDs, via /proc/sys/kernel/pid_max
-
 * be able to specify a forced restart of service A where service B depends on, in case B
   needs to be auto-respawned?
 

sysctl.d/50-default.conf

@@ -40,3 +40,7 @@ fs.protected_symlinks = 1
 # Enable regular file and FIFO protection
 fs.protected_regular = 1
 fs.protected_fifos = 1
+
+# Bump the numeric PID range to its maximum of 2^22 (from the in-kernel default
+# of 2^16), to make PID collisions less likely.
+kernel.pid_max = 4194304