[LTP] [PATCH 03/10] ksm: Add max_runtime to tests

[Cyril Hrubis]

Hi!
> ksm02, ksm04 and ksm05 take 10+ seconds to finish. Set max_runtime to avoid
> random timeout issues.

I wonder if we can do better.

I guess that the actual runtime does depends on the size of the RAM
because we wait for at least two finished full scans for ksmd. I guess
that for large enough machines we would end up with minutes of runtime.

So I guess that it would make more sense to treat the max_runtime as a
upper bound and set it to large enough number as we do for AIO testcases
(30 minutes) and then make the wait_ksmd_full_scan() runtime avare so
that it exits when the runtime is exhausted. With that we would get a
clear message that we timed-out in the loop that waited for the ksmd
scan.

> Signed-off-by: Martin Doucha <mdoucha@suse.cz>
> ---
>  testcases/kernel/mem/ksm/ksm02.c | 1 +
>  testcases/kernel/mem/ksm/ksm04.c | 1 +
>  testcases/kernel/mem/ksm/ksm05.c | 1 +
>  3 files changed, 3 insertions(+)
> 
> diff --git a/testcases/kernel/mem/ksm/ksm02.c b/testcases/kernel/mem/ksm/ksm02.c
> index 1cb7d8e73..1f5677425 100644
> --- a/testcases/kernel/mem/ksm/ksm02.c
> +++ b/testcases/kernel/mem/ksm/ksm02.c
> @@ -110,6 +110,7 @@ static struct tst_test test = {
>  	},
>  	.test_all = verify_ksm,
>  	.min_kver = "2.6.32",
> +	.max_runtime = 20,
>  	.needs_cgroup_ctrls = (const char *const []){ "cpuset", NULL },
>  };
>  
> diff --git a/testcases/kernel/mem/ksm/ksm04.c b/testcases/kernel/mem/ksm/ksm04.c
> index 39c741876..f7dc5befc 100644
> --- a/testcases/kernel/mem/ksm/ksm04.c
> +++ b/testcases/kernel/mem/ksm/ksm04.c
> @@ -112,6 +112,7 @@ static struct tst_test test = {
>  	},
>  	.test_all = verify_ksm,
>  	.min_kver = "2.6.32",
> +	.max_runtime = 20,
>  	.needs_cgroup_ctrls = (const char *const []){
>  		"memory", "cpuset", NULL
>  	},
> diff --git a/testcases/kernel/mem/ksm/ksm05.c b/testcases/kernel/mem/ksm/ksm05.c
> index 146a9a3b7..6f94c4a9c 100644
> --- a/testcases/kernel/mem/ksm/ksm05.c
> +++ b/testcases/kernel/mem/ksm/ksm05.c
> @@ -88,6 +88,7 @@ static struct tst_test test = {
>  	.forks_child = 1,
>  	.test_all = test_ksm,
>  	.min_kver = "2.6.32",
> +	.max_runtime = 10,
>  	.save_restore = (const struct tst_path_val[]) {
>  		{"!/sys/kernel/mm/ksm/run", "1"},
>  		{}
> -- 
> 2.37.2
> 
> 
> -- 
> Mailing list info: https://lists.linux.it/listinfo/ltp

-- 
Cyril Hrubis
chrubis@suse.cz