Re: [LTP] [PATCH v6 1/2] mem/lib: add vm tunable file read/write/check func

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

On 12/28/2011 02:47 PM, Caspar Zhang wrote:

> On 11/15/2011 09:14 PM, Zhouping Liu wrote:
>> hi, Cyril & Garrett
>> v5 -> v6: updated the sscanf() function in read_meminfo() in order to avoid buffer overflow.
>>
>> please feel free to comment the patch.
>> BTW: you would miss the patch.
>>
>> There are several vm tunable files under /proc/sys/vm, I will compose
>> some cases for testing the basic functions of them. This patch is adding
>> the read/write/check functions to mem lib so that I can include them in
>> my testcases.
>>
>> set_sys_tune():   set a long long integer value to a vm tunable file.
>> get_sys_tune():   get a long long integer value from a vm tunable file.
>> check_sys_tune(): check to confirm the value in tunable file meets our
>>                   expectation.
>> read_meminfo():   read the special value from /proc/meminfo.
>>
>> Since most of the values in vm tunable files contain only single
>> integer, the functions I added only read/write long long values for now.
>> For those files not storing single interger (e.g. lowmem_reserve_ratio),
>> these functions will not be used in the case.
>>
>> Signed-off-by: Zhouping Liu <zliu@redhat.com>
>> ---
>>  runtest/mm                         |    7 +++
>>  testcases/kernel/mem/include/mem.h |    7 +++
>>  testcases/kernel/mem/lib/mem.c     |   84 +++++++++++++++++++++++++++++++++++-
>>  3 files changed, 97 insertions(+), 1 deletions(-)
> 
> After talking to Zhouping Liu, I committed this patch with some
> modifications.


I saw that the patch you just committed defined an unused "PATH_SYSVM",
but as your comment of this patch, the set/get functions is just for sysfiles
under PATH_SYSVM, if so, you should do things like below first?

snprintf(buf, BUFSIZ, "%s%s", PATH_KSM, path);

Thanks
-Wanlong Gao

> 
> Thanks,
> Caspar
> 
> 
> ------------------------------------------------------------------------------
> Write once. Port to many.
> Get the SDK and tools to simplify cross-platform app development. Create 
> new or port existing apps to sell to consumers worldwide. Explore the 
> Intel AppUpSM program developer opportunity. appdeveloper.intel.com/join
> http://p.sf.net/sfu/intel-appdev
> _______________________________________________
> Ltp-list mailing list
> Ltp-list@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/ltp-list
> 



------------------------------------------------------------------------------
Write once. Port to many.
Get the SDK and tools to simplify cross-platform app development. Create 
new or port existing apps to sell to consumers worldwide. Explore the 
Intel AppUpSM program developer opportunity. appdeveloper.intel.com/join
http://p.sf.net/sfu/intel-appdev
_______________________________________________
Ltp-list mailing list
Ltp-list@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/ltp-list