From 0c3e7682ba04e94c32ca5b8ade98d33324e78d1d Mon Sep 17 00:00:00 2001
From: Thomas Schoebel-Theuer <mars@box>
Date: Tue, 17 Nov 2020 18:28:58 +0100
Subject: [PATCH] marsadm: automatic systemd parallelization

---
 userspace/marsadm | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/userspace/marsadm b/userspace/marsadm
index 21894c6c..8b33b3f0 100755
--- a/userspace/marsadm
+++ b/userspace/marsadm
@@ -31,7 +31,7 @@ umask 0077;
 
 # global defaults
 
-my $parallel = -1;
+my $parallel = -999;
 my $single_step = 0;
 my $inject_phase = 0;
 my $compat_deletions = 1;
@@ -9855,6 +9855,24 @@ sub expand_res_list {
   } elsif ($res =~ m/,/) {
     @res_list = split(",", $res);
   }
+  # check for any systemd activations once
+  if ($parallel <= -999) {
+    $parallel = -998;
+    my $count = scalar(@res_list);
+    if ($count > 1) {
+      my $systemd_activated = 0;
+      foreach my $this_res (@res_list) {
+	if (systemd_present($cmd, $this_res)) {
+	  $systemd_activated++;
+	  last;
+	}
+      }
+      if ($systemd_activated) {
+	lprint "Systemd is activated, acting like --parallel=0\n" if $verbose;
+	$parallel = 0;
+      }
+    }
+  }
   return sort alphanum_cmp @res_list;
 }