From 9ded9cd14cc03c67291b10a5c42ce5094ba0912f Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Fri, 13 Nov 2015 19:28:32 +0100
Subject: core: enable TasksMax= for all services by default, and set it to 512

Also, enable TasksAccounting= for all services by default, too.

See:

http://lists.freedesktop.org/archives/systemd-devel/2015-November/035006.html
---
 man/systemd-system.conf.xml |  6 ++++--
 src/core/main.c             |  4 ++--
 src/core/manager.c          |  3 ++-
 src/core/system.conf        |  4 ++--
 src/test/test-cgroup-mask.c | 10 ++++++++++
 5 files changed, 20 insertions(+), 7 deletions(-)

diff --git a/man/systemd-system.conf.xml b/man/systemd-system.conf.xml
index 0050f24f8e..ead52951da 100644
--- a/man/systemd-system.conf.xml
+++ b/man/systemd-system.conf.xml
@@ -317,7 +317,9 @@
         <varname>MemoryAccounting=</varname> and
         <varname>TasksAccounting=</varname>. See
         <citerefentry><refentrytitle>systemd.resource-control</refentrytitle><manvolnum>5</manvolnum></citerefentry>
-        for details on the per-unit settings.</para></listitem>
+        for details on the per-unit
+        settings. <varname>DefaulTasksAccounting=</varname> defaults
+        to on, the other three settings to off.</para></listitem>
       </varlistentry>
 
       <varlistentry>
@@ -328,7 +330,7 @@
         <citerefentry><refentrytitle>systemd.resource-control</refentrytitle><manvolnum>5</manvolnum></citerefentry>
         for details. This setting applies to all unit types that
         support resource control settings, with the exception of slice
-        units.</para></listitem>
+        units. Defaults to 512.</para></listitem>
       </varlistentry>
 
       <varlistentry>
diff --git a/src/core/main.c b/src/core/main.c
index f8e1d88335..a09ce0f083 100644
--- a/src/core/main.c
+++ b/src/core/main.c
@@ -125,8 +125,8 @@ static FILE* arg_serialization = NULL;
 static bool arg_default_cpu_accounting = false;
 static bool arg_default_blockio_accounting = false;
 static bool arg_default_memory_accounting = false;
-static bool arg_default_tasks_accounting = false;
-static uint64_t arg_default_tasks_max = (uint64_t) -1;
+static bool arg_default_tasks_accounting = true;
+static uint64_t arg_default_tasks_max = UINT64_C(512);
 
 static void pager_open_if_enabled(void) {
 
diff --git a/src/core/manager.c b/src/core/manager.c
index fd915d748c..edff6758c5 100644
--- a/src/core/manager.c
+++ b/src/core/manager.c
@@ -577,7 +577,8 @@ int manager_new(ManagerRunningAs running_as, bool test_run, Manager **_m) {
         m->running_as = running_as;
         m->exit_code = _MANAGER_EXIT_CODE_INVALID;
         m->default_timer_accuracy_usec = USEC_PER_MINUTE;
-        m->default_tasks_max = (uint64_t) -1;
+        m->default_tasks_accounting = true;
+        m->default_tasks_max = UINT64_C(512);
 
         /* Prepare log fields we can use for structured logging */
         m->unit_log_field = unit_log_fields[running_as];
diff --git a/src/core/system.conf b/src/core/system.conf
index 63bff085eb..e2ded27333 100644
--- a/src/core/system.conf
+++ b/src/core/system.conf
@@ -40,8 +40,8 @@
 #DefaultCPUAccounting=no
 #DefaultBlockIOAccounting=no
 #DefaultMemoryAccounting=no
-#DefaultTasksAccounting=no
-#DefaultTasksMax=
+#DefaultTasksAccounting=yes
+#DefaultTasksMax=512
 #DefaultLimitCPU=
 #DefaultLimitFSIZE=
 #DefaultLimitDATA=
diff --git a/src/test/test-cgroup-mask.c b/src/test/test-cgroup-mask.c
index de6c421b82..85b0d607d6 100644
--- a/src/test/test-cgroup-mask.c
+++ b/src/test/test-cgroup-mask.c
@@ -40,6 +40,16 @@ static int test_cgroup_mask(void) {
                 puts("manager_new: Permission denied. Skipping test.");
                 return EXIT_TEST_SKIP;
         }
+
+        /* Turn off all kinds of default accouning, so that we can
+         * verify the masks resulting of our configuration and nothing
+         * else. */
+        m->default_cpu_accounting =
+                m->default_memory_accounting =
+                m->default_blockio_accounting =
+                m->default_tasks_accounting = false;
+        m->default_tasks_max = (uint64_t) -1;
+
         assert_se(r >= 0);
         assert_se(manager_startup(m, serial, fdset) >= 0);
 
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