Re: Possible bug - LTP failure for memcg

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Hi!
> Signed-off-by: Michal Hocko <miso@xxxxxxxxxxxxxx>

                                 ^
			       forgotten git config user.email?
> ---
>  testcases/kernel/controllers/memcg/functional/memcg_function_test.sh | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/testcases/kernel/controllers/memcg/functional/memcg_function_test.sh b/testcases/kernel/controllers/memcg/functional/memcg_function_test.sh
> index cfc75fa730df..399c5614468a 100755
> --- a/testcases/kernel/controllers/memcg/functional/memcg_function_test.sh
> +++ b/testcases/kernel/controllers/memcg/functional/memcg_function_test.sh
> @@ -211,8 +211,8 @@ testcase_29()
>  	echo $pid > tasks
>  	kill -s USR1 $pid 2> /dev/null
>  	sleep 1
> -	echo $pid > ../tasks

This change breaks the testcase on older kernels:

./memcg_function_test.sh: line 215: echo: write error: Device or resource busy
memcg_function_test   29  TFAIL  :  ltpapicmd.c:190: force memory failed

$ uname -r
3.0.101-0.35-default

> +	# This expects that there is swap configured
>  	echo 1 > memory.force_empty
>  	if [ $? -eq 0 ]; then
>  		result $PASS "force memory succeeded"
> @@ -225,7 +225,7 @@ testcase_29()
>  
>  testcase_30()
>  {
> -	$TEST_PATH/memcg_process --mmap-anon -s $PAGESIZE &
> +	$TEST_PATH/memcg_process --mmap-lock2 -s $PAGESIZE &
>  	pid=$!
>  	sleep 1
>  	echo $pid > tasks

This part is OK.

-- 
Cyril Hrubis
chrubis@xxxxxxx

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