Re: [LTP] [PATCH v3 0/3] mm/thp: add two new case

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

Hi Zhouping:
> The patchset is desinged to test THP functionality.
> 
> when one process allocate hugepage aligned anonymouse pages,
> kernel thread 'khugepaged' controlled by sysfs knobs
> /sys/kernel/mm/transparent_hugepage/* will scan them, and make
> them as transparent hugepage if they are suited, you can find out
> how many transparent hugepages are there in one process from
> /proc/<pid>/smaps, among the file contents, 'AnonHugePages' entry
> stand for transparent hugepage.
> 
> V1 to V2:
> accepted Wanlong's suggestion, added some comment for '10s'
> added 'static' key word for single-file-only variant.
> 
> V2 to V3:
> added some comments for low memory system.

I just see that on the kernel before v2.6.39, the "defrag"
interface is "[yes] no" or "yes [no]"(eg. RHEL6). While it's changed
to boolean after commit e27e6151b154 in v2.6.39-rc4.

So, you should deal with the multi-style interface of this "defrag",

+		SAFE_FILE_SCANF(cleanup, PATH_KHPD "defrag", "%ld", &defrag);

Thanks,
Wanlong Gao

> 
> Wanlong, I included you into 'Tested-by' thread, thanks for
> your reviewing and testing the patchset.
> 
> Zhouping Liu (3):
>   mm/thp: new case thp04.c
>   lib/mem: introduce a new function set_global_mempolicy()
>   mm/thp: add new case thp05
> 
>  runtest/mm                         |   6 ++
>  testcases/kernel/mem/include/mem.h |  12 +++
>  testcases/kernel/mem/lib/mem.c     | 203 ++++++++++++++++++++++++++++++++++++-
>  testcases/kernel/mem/thp/thp04.c   | 136 +++++++++++++++++++++++++
>  testcases/kernel/mem/thp/thp05.c   | 152 +++++++++++++++++++++++++++
>  5 files changed, 508 insertions(+), 1 deletion(-)
>  create mode 100644 testcases/kernel/mem/thp/thp04.c
>  create mode 100644 testcases/kernel/mem/thp/thp05.c
> 


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