Re: [LTP] [PATCH v2] mm/tunable: add a new testcase min_free_kbytes

[Wanlong Gao <gaowanlong@cn.fujitsu.com>]

On 03/23/2012 10:12 PM, Zhouping Liu wrote:

> 
> The tune is used to control free memory, and system always
> reserve > min_free_kbytes memory at least.
> 
> Since the tune is not too large or too little, which will
> lead to the system hang, so I choose two cases, and test them
> on all overcommit_memory policy (0, 1, 2), at the same time,
> compare the current free memory with the tunable value
> repeatedly.
> 
> a) default min_free_kbytes with all overcommit memory policy
> b) half of mem_free with all overcommit memory policy


pushed, thanks Liu, if has problems, please feel free to send
further fixing patches.

Regards,
Wanlong Gao

> 
> Signed-off-by: Zhouping Liu <zliu@redhat.com>
> ---
>  runtest/mm                                     |    2 +
>  testcases/kernel/mem/tunable/min_free_kbytes.c |  237 ++++++++++++++++++++++++
>  2 files changed, 239 insertions(+), 0 deletions(-)
>  create mode 100644 testcases/kernel/mem/tunable/min_free_kbytes.c
> 
> thanks caspar's suggestions, I updated the patch.
> v1 -> v2:
>    1) using sig_handler to control the check_monitor thread,
>    2) moved tst_* funcs in child,
>    3) catch the return value in eatup_mem().



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