[LTP] [PATCH 1/6 v3] cgroups/cgroup_regression_test: clear dmesg before test

[Jan Stancek <jstancek@redhat.com>]

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dmesg can rotate and number of found bugs can actually go down,
clear the buffer before test to avoid this

Signed-off-by: Jan Stancek <jstancek@redhat.com>
---
   .../controllers/cgroup/cgroup_regression_test.sh   |    3 +++
   1 files changed, 3 insertions(+), 0 deletions(-)




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diff --git a/testcases/kernel/controllers/cgroup/cgroup_regression_test.sh b/testcases/kernel/controllers/cgroup/cgroup_regression_test.sh
index 878f91a..5615053 100755
--- a/testcases/kernel/controllers/cgroup/cgroup_regression_test.sh
+++ b/testcases/kernel/controllers/cgroup/cgroup_regression_test.sh
@@ -40,6 +40,7 @@ elif [ "x$(id -ru)" != x0 ]; then
 	exit 0
 fi
 
+dmesg -c > /dev/null
 nr_bug=`dmesg | grep -c "kernel BUG"`
 nr_null=`dmesg | grep -c "kernel NULL pointer dereference"`
 nr_warning=`dmesg | grep -c "^WARNING"`
@@ -78,6 +79,8 @@ check_kernel_bug()
 	nr_warning=$new_warning
 	nr_lockdep=$new_lockdep
 
+	echo "check_kernel_bug found something!"
+	dmesg
 	failed=1
 	return 0
 }



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