From baafbef76670f0bd9bf0269648cf3c3565d53d4d Mon Sep 17 00:00:00 2001
From: Weng Meiling <wengmeiling.weng@huawei.com>
Date: Tue, 23 Jul 2013 14:30:33 +0200
Subject: [PATCH] when we use cgsnapshot with the given controller, the result
 always displays the last mounted controller which is not specified, so fix
 it.

Example:

# lssubsys  -m
cpuset /cgroup/cpuset
cpu /cgroup/cpu
# lscgroup
cpu:/
cpu:/test
cpuset:/
cpuset:/test

before the patch:

# cgsnapshot -s cpu
# Configuration file generated by cgsnapshot
mount {
	cpuset = /cgroup/cpuset;
	cpu = /cgroup/cpu;
}

group test {
	cpu {
		cpu.rt_period_us="1000000";
		cpu.rt_runtime_us="0";
		cpu.shares="1024";
	}
}

group test {
	cpuset {
		cpuset.memory_spread_slab="0";
		cpuset.memory_spread_page="0";
		cpuset.memory_migrate="0";
		cpuset.sched_relax_domain_level="-1";
		cpuset.sched_load_balance="1";
		cpuset.mem_hardwall="0";
		cpuset.mem_exclusive="0";
		cpuset.cpu_exclusive="0";
		cpuset.mems="";
		cpuset.cpus="";
	}
}

after the patch:

# cgsnapshot -s cpu
# Configuration file generated by cgsnapshot
mount {
	cpuset = /cgroup/cpuset;
	cpu = /cgroup/cpu;
}

group test {
	cpu {
		cpu.rt_period_us="1000000";
		cpu.rt_runtime_us="0";
		cpu.shares="1024";
	}
}

Signed-off-by: Weng Meiling <wengmeiling.weng@huawei.com>
---
 src/tools/cgsnapshot.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/tools/cgsnapshot.c b/src/tools/cgsnapshot.c
index 8217798f..046c70a1 100644
--- a/src/tools/cgsnapshot.c
+++ b/src/tools/cgsnapshot.c
@@ -582,7 +582,9 @@ static int parse_controllers(cont_name_t cont_names[CG_CONTROLLER_MAX],
 		ret = cgroup_get_controller_next(&handle, &controller);
 	}
 
-	if (max != 0) {
+	if ((!(flags & FL_LIST) ||
+		(is_ctlr_on_list(controllers, cont_names)))
+		&& (max != 0)) {
 		(controllers[max])[0] = '\0';
 		ret = display_controller_data(
 			controllers, program_name);
-- 
2.47.2