File Do-not-delegate-cgroup-control-blkid.patch of Package systemd

From: Werner Fink <werner@suse.de>
Date: Thu, 22 Oct 22 2015 14:08:43 +0000
Subject: Do not delegate cgroup blkio control

Do not delegate cgroup blkio control as this implies a huge
IO performance breakdown.

---
 src/core/cgroup.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- src/core/cgroup.c
+++ src/core/cgroup.c	2015-10-22 15:58:14.947417853 +0200
@@ -446,7 +446,7 @@ CGroupControllerMask unit_get_cgroup_mas
 
                 e = unit_get_exec_context(u);
                 if (!e || exec_context_maintains_privileges(e))
-                        return _CGROUP_CONTROLLER_MASK_ALL;
+                        return _CGROUP_CONTROLLER_MASK_ALL & ~CGROUP_BLKIO;
         }
 
         return cgroup_context_get_mask(c);