[LTP] [PATCH v1 1/4] lib: add new cgroup test API

[Jan Stancek <jstancek@redhat.com>]

----- Original Message -----
> +
> +void tst_cgroup_mem_set_maxbytes(long memsz)
> +{
> +	tst_cgroup_move_current(TST_CGROUP_MEMCG);

It seems a bit unexpected, that setting a limit also moves current
process to cgroup. If test forks two processes, it has to set maxbytes
twice, to get the desired side-effect.

> +
> +	if (tst_cg_ver & TST_CGROUP_V1)
> +		SAFE_FILE_PRINTF(PATH_CG1_MEM_LTP "/memory.limit_in_bytes", "%ld", memsz);
> +
> +	if (tst_cg_ver & TST_CGROUP_V2)
> +		SAFE_FILE_PRINTF(PATH_TMP_CG2_LTP "/memory.max", "%ld", memsz);
> +}
> +
> +void tst_cgroup_mem_set_maxswap(long memsz)
> +{
> +	tst_cgroup_move_current(TST_CGROUP_MEMCG);
> +
> +	if (tst_cg_ver & TST_CGROUP_V1)
> +		SAFE_FILE_PRINTF(PATH_CG1_MEM_LTP "/memory.memsw.limit_in_bytes", "%ld",
> memsz);
> +	if (tst_cg_ver & TST_CGROUP_V2)
> +		SAFE_FILE_PRINTF(PATH_TMP_CG2_LTP "/memory.swap.max", "%ld", memsz);
> +}
> --
> 2.21.1
> 
>