linux.git/tools/testing/selftests/vm, branch v5.18-rc2

selftests: kselftest framework: provide "finished" helper

2022-03-25T02:06:51+00:00

Instead of having each time that wants to use ksft_exit() have to figure
out the internals of kselftest.h, add the helper ksft_finished() that
makes sure the passes, xfails, and skips are equal to the test plan count.

Link: https://lkml.kernel.org/r/20220201013717.2464392-1-keescook@chromium.org
Signed-off-by: Kees Cook 
Cc: Shuah Khan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

userfaultfd/selftests: enable hugetlb remap and remove event testing

2022-03-25T02:06:50+00:00

With MADV_DONTNEED support added to hugetlb mappings, mremap testing can
also be enabled for hugetlb.

Modify the tests to use madvise MADV_DONTNEED and MADV_REMOVE instead of
fallocate hole puch for releasing hugetlb pages.

Link: https://lkml.kernel.org/r/20220215002348.128823-4-mike.kravetz@oracle.com
Signed-off-by: Mike Kravetz 
Reviewed-by: Axel Rasmussen 
Cc: Andrea Arcangeli 
Cc: David Hildenbrand 
Cc: Michal Hocko 
Cc: Mike Rapoport 
Cc: Mina Almasry 
Cc: Naoya Horiguchi 
Cc: Peter Xu 
Cc: Shuah Khan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

selftests/vm: add hugetlb madvise MADV_DONTNEED MADV_REMOVE test

2022-03-25T02:06:50+00:00

Now that MADV_DONTNEED support for hugetlb is enabled, add corresponding
tests.  MADV_REMOVE has been enabled for some time, but no tests exist so
add them as well.

Link: https://lkml.kernel.org/r/20220215002348.128823-3-mike.kravetz@oracle.com
Signed-off-by: Mike Kravetz 
Reviewed-by: Shuah Khan 
Cc: Andrea Arcangeli 
Cc: Axel Rasmussen 
Cc: David Hildenbrand 
Cc: Michal Hocko 
Cc: Mike Rapoport 
Cc: Mina Almasry 
Cc: Naoya Horiguchi 
Cc: Peter Xu 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

selftest/vm: add helpers to detect PAGE_SIZE and PAGE_SHIFT

2022-03-25T02:06:45+00:00

PAGE_SIZE is not 4096 in many configurations, particularly ppc64 uses 64K
pages in majority of cases.

Add helpers to detect PAGE_SIZE and PAGE_SHIFT dynamically.

Without this tests are broken w.r.t reading /proc/self/pagemap

    if (pread(pagemap_fd, ent, sizeof(ent),
              (uintptr_t)ptr >> (PAGE_SHIFT - 3)) != sizeof(ent))
              err(2, "read pagemap");

Link: https://lkml.kernel.org/r/20220307054355.149820-2-aneesh.kumar@linux.ibm.com
Signed-off-by: Mike Rapoport 
Signed-off-by: Aneesh Kumar K.V 
Cc: Shuah Khan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

selftest/vm: add util.h and and move helper functions there

2022-03-25T02:06:45+00:00

Avoid code duplication by adding util.h.  No functional change in this
patch.

Link: https://lkml.kernel.org/r/20220307054355.149820-1-aneesh.kumar@linux.ibm.com
Signed-off-by: Aneesh Kumar K.V 
Cc: Shuah Khan 
Cc: Mike Rapoport 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Merge tag 'linux-kselftest-next-5.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

2022-03-23T19:53:00+00:00

Pull Kselftest updates from Shuah Khan:
 "Several build and cleanup fixes:

   - removing obsolete config options

   - removing dependency on internal kernel macros

   - adding config options

   - several build fixes related to headers and install paths"

* tag 'linux-kselftest-next-5.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: (22 commits)
  selftests: Fix build when $(O) points to a relative path
  selftests: netfilter: fix a build error on openSUSE
  selftests: kvm: add generated file to the .gitignore
  selftests/exec: add generated files to .gitignore
  selftests: add kselftest_install to .gitignore
  selftests/rtc: continuously read RTC in a loop for 30s
  selftests/lkdtm: Add UBSAN config
  selftests/lkdtm: Remove dead config option
  selftests/exec: Rename file binfmt_script to binfmt_script.py
  selftests: Use -isystem instead of -I to include headers
  selftests: vm: remove dependecy from internal kernel macros
  selftests: vm: Add the uapi headers include variable
  selftests: mptcp: Add the uapi headers include variable
  selftests: net: Add the uapi headers include variable
  selftests: landlock: Add the uapi headers include variable
  selftests: kvm: Add the uapi headers include variable
  selftests: futex: Add the uapi headers include variable
  selftests: Correct the headers install path
  selftests: Add and export a kernel uapi headers path
  selftests: set the BUILD variable to absolute path
  ...

Merge tag 'folio-5.18c' of git://git.infradead.org/users/willy/pagecache

2022-03-23T00:03:12+00:00

Pull folio updates from Matthew Wilcox:

 - Rewrite how munlock works to massively reduce the contention on
   i_mmap_rwsem (Hugh Dickins):

     https://lore.kernel.org/linux-mm/8e4356d-9622-a7f0-b2c-f116b5f2efea@google.com/

 - Sort out the page refcount mess for ZONE_DEVICE pages (Christoph
   Hellwig):

     https://lore.kernel.org/linux-mm/20220210072828.2930359-1-hch@lst.de/

 - Convert GUP to use folios and make pincount available for order-1
   pages. (Matthew Wilcox)

 - Convert a few more truncation functions to use folios (Matthew
   Wilcox)

 - Convert page_vma_mapped_walk to use PFNs instead of pages (Matthew
   Wilcox)

 - Convert rmap_walk to use folios (Matthew Wilcox)

 - Convert most of shrink_page_list() to use a folio (Matthew Wilcox)

 - Add support for creating large folios in readahead (Matthew Wilcox)

* tag 'folio-5.18c' of git://git.infradead.org/users/willy/pagecache: (114 commits)
  mm/damon: minor cleanup for damon_pa_young
  selftests/vm/transhuge-stress: Support file-backed PMD folios
  mm/filemap: Support VM_HUGEPAGE for file mappings
  mm/readahead: Switch to page_cache_ra_order
  mm/readahead: Align file mappings for non-DAX
  mm/readahead: Add large folio readahead
  mm: Support arbitrary THP sizes
  mm: Make large folios depend on THP
  mm: Fix READ_ONLY_THP warning
  mm/filemap: Allow large folios to be added to the page cache
  mm: Turn can_split_huge_page() into can_split_folio()
  mm/vmscan: Convert pageout() to take a folio
  mm/vmscan: Turn page_check_references() into folio_check_references()
  mm/vmscan: Account large folios correctly
  mm/vmscan: Optimise shrink_page_list for non-PMD-sized folios
  mm/vmscan: Free non-shmem folios without splitting them
  mm/rmap: Constify the rmap_walk_control argument
  mm/rmap: Convert rmap_walk() to take a folio
  mm: Turn page_anon_vma() into folio_anon_vma()
  mm/rmap: Turn page_lock_anon_vma_read() into folio_lock_anon_vma_read()
  ...

userfaultfd/selftests: fix uninitialized_var.cocci warning

2022-03-22T22:57:08+00:00

Fix following coccicheck warning:
tools/testing/selftests/vm/userfaultfd.c:556:23-24:
WARNING this kind of initialization is deprecated

`unsigned long page_nr = *(&page_nr)` has the same form of
uninitialized_var() macro. I remove the redundant assignement. It has
been tested with gcc (Debian 8.3.0-6) 8.3.0.

The patch which removed uninitialized_var() is:
https://lore.kernel.org/all/20121028102007.GA7547@gmail.com/ And there is
very few "/* GCC */" comments in the Linux kernel code now.

Link: https://lkml.kernel.org/r/20220304082333.9252-1-guozhengkui@vivo.com
Signed-off-by: Guo Zhengkui 
Cc: Shuah Khan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

selftests: vm: add a hugetlb test case

2022-03-22T22:57:08+00:00

Since the head vmemmap page frame associated with each HugeTLB page is
reused, we should hide the PG_head flag of tail struct page from the
user.  Add a tese case to check whether it is work properly.  The test
steps are as follows.

  1) alloc 2MB hugeTLB
  2) get each page frame
  3) apply those APIs in each page frame
  4) Those APIs work completely the same as before.

Reading the flags of a page by /proc/kpageflags is done in
stable_page_flags(), which has invoked PageHead(), PageTail(),
PageCompound() and compound_head().

If those APIs work properly, the head page must have 15 and 17 bits set.
And tail pages must have 16 and 17 bits set but 15 bit unset.  Those
flags are checked in check_page_flags().

Link: https://lkml.kernel.org/r/20211101031651.75851-5-songmuchun@bytedance.com
Signed-off-by: Muchun Song 
Reviewed-by: Barry Song 
Cc: Bodeddula Balasubramaniam 
Cc: Chen Huang 
Cc: David Hildenbrand 
Cc: Fam Zheng 
Cc: Jonathan Corbet 
Cc: Matthew Wilcox 
Cc: Michal Hocko 
Cc: Mike Kravetz 
Cc: Oscar Salvador 
Cc: Qi Zheng 
Cc: Xiongchun Duan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

selftests, x86: fix how check_cc.sh is being invoked

2022-03-22T22:57:04+00:00

The $(CC) variable used in Makefiles could contain several arguments
such as "ccache gcc".  These need to be passed as a single string to
check_cc.sh, otherwise only the first argument will be used as the
compiler command.  Without quotes, the $(CC) variable is passed as
distinct arguments which causes the script to fail to build trivial
programs.

Fix this by adding quotes around $(CC) when calling check_cc.sh to pass
the whole string as a single argument to the script even if it has
several words such as "ccache gcc".

Link: https://lkml.kernel.org/r/d0d460d7be0107a69e3c52477761a6fe694c1840.1646991629.git.guillaume.tucker@collabora.com
Fixes: e9886ace222e ("selftests, x86: Rework x86 target architecture detection")
Signed-off-by: Guillaume Tucker 
Tested-by: "kernelci.org bot" 
Reviewed-by: Guenter Roeck 
Cc: Shuah Khan 
Cc: Borislav Petkov 
Cc: Dave Hansen 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds