[PATCH v4] selftest/vm: Move the 128 TB mmap boundary test to the generic VM directory

[Ingo Molnar <mingo@kernel.org>]

* Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> wrote:

> Architectures like ppc64 do support mmap hint addr based large address space
> selection. This test can be run on those architectures too. Move the test to
> selftest/vm so that other archs can use the same.
> 
> We also add a few new test scenarios in this patch. We do test few boundary
> condition before we do a high address mmap. ppc64 use the addr limit to validate
> addr in the fault path. We had bugs in this area w.r.t slb fault handling
> before we updated the addr limit.
> 
> We also touch the allocated space to make sure we don't have any bugs in the
> fault handling path.
> 
> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
> ---
> Changes from V2:
> * Rebase on top of -tip tree.
> * update the correct license
> * use memset to touch the full mmap range.
> 
>  tools/testing/selftests/vm/Makefile         |   1 +
>  tools/testing/selftests/vm/run_vmtests      |  11 ++
>  tools/testing/selftests/vm/va_128TBswitch.c | 297 ++++++++++++++++++++++++++++
>  tools/testing/selftests/x86/5lvl.c          | 177 -----------------
>  4 files changed, 309 insertions(+), 177 deletions(-)
>  create mode 100644 tools/testing/selftests/vm/va_128TBswitch.c
>  delete mode 100644 tools/testing/selftests/x86/5lvl.c

This will now apply (almost) cleanly to Linus's latest tree - I fixed up a trivial 
conflict in selftests/vm/Makefile.

Note that I also improved the changelog.

Note #2: I'd suggest this patch to be split into two patches:

 - patch 1 moves the testcase to vm/selftests
 - patch 2 does all the additional improvements

because this way all the deltas will be much easier to see and review.

Thanks,

	Ingo

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