kernel.git/tools/testing/selftests/vm/Makefile, branch linux-5.18.y

selftests: vm: Makefile: rename TARGETS to VMTARGETS

2022-05-10T00:34:29Z

The tools/testing/selftests/vm/Makefile uses the variable TARGETS internally to generate a list of platform-specific binary build targets suffixed with _{32,64}. When building the selftests using its own Makefile directly, such as via the following command run in a kernel tree: One receives an error such as the following: make: Entering directory '/root/linux/tools/testing/selftests' make --no-builtin-rules ARCH=x86 -C ../../.. headers_install make[1]: Entering directory '/root/linux' INSTALL ./usr/include make[1]: Leaving directory '/root/linux' make[1]: Entering directory '/root/linux/tools/testing/selftests/vm' make[1]: *** No rule to make target 'vm.c', needed by '/root/linux/tools/testing/selftests/vm/vm_64'. Stop. make[1]: Leaving directory '/root/linux/tools/testing/selftests/vm' make: *** [Makefile:175: all] Error 2 make: Leaving directory '/root/linux/tools/testing/selftests' The TARGETS variable passed to tools/testing/selftests/Makefile collides with the TARGETS used in tools/testing/selftests/vm/Makefile, so rename the latter to VMTARGETS, eliminating the collision with no functional change. Link: https://lkml.kernel.org/r/20220504213454.1282532-1-jsavitz@redhat.com Fixes: f21fda8f6453 ("selftests: vm: pkeys: fix multilib builds for x86") Signed-off-by: Joel Savitz Acked-by: Nico Pache Cc: Joel Savitz Cc: Shuah Khan Cc: Sandipan Das Cc: Dave Hansen Signed-off-by: Andrew Morton

selftests/vm: add hugetlb madvise MADV_DONTNEED MADV_REMOVE test

2022-03-25T02:06:50Z

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

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

2022-03-23T19:53:00Z

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 ...

selftests: vm: add a hugetlb test case

2022-03-22T22:57:08Z

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

2022-03-22T22:57:04Z

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

selftests: vm: fix clang build error multiple output files

2022-03-17T18:02:13Z

When building the vm selftests using clang, some errors are seen due to having headers in the compilation command: clang -Wall -I ../../../../usr/include -no-pie gup_test.c ../../../../mm/gup_test.h -lrt -lpthread -o .../tools/testing/selftests/vm/gup_test clang: error: cannot specify -o when generating multiple output files make[1]: *** [../lib.mk:146: .../tools/testing/selftests/vm/gup_test] Error 1 Rework to add the header files to LOCAL_HDRS before including ../lib.mk, since the dependency is evaluated in '$(OUTPUT)/%:%.c $(LOCAL_HDRS)' in file lib.mk. Link: https://lkml.kernel.org/r/20220304000645.1888133-1-yosryahmed@google.com Signed-off-by: Yosry Ahmed Cc: Shuah Khan Cc: Nathan Chancellor Cc: Nick Desaulniers Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

selftests: vm: Add the uapi headers include variable

2022-02-24T00:21:04Z

Out of tree build of this test fails if relative path of the output directory is specified. Add the KHDR_INCLUDES to correctly reach the headers. Acked-by: Paolo Bonzini Signed-off-by: Muhammad Usama Anjum Tested-by: Alistair Popple Signed-off-by: Shuah Khan

mm, hugepages: add hugetlb vma mremap() test

2021-11-06T20:30:39Z

[almasrymina@google.com: v8] Link: https://lkml.kernel.org/r/20211014200542.4126947-2-almasrymina@google.com [wanjiabing@vivo.com: remove duplicated include in hugepage-mremap] Link: https://lkml.kernel.org/r/20211021122944.8857-1-wanjiabing@vivo.com Link: https://lkml.kernel.org/r/20211013195825.3058275-2-almasrymina@google.com Signed-off-by: Mina Almasry Signed-off-by: Wan Jiabing Acked-by: Mike Kravetz Cc: Ken Chen Cc: Chris Kennelly Cc: Michal Hocko Cc: Vlastimil Babka Cc: Kirill Shutemov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

selftests: vm: add KSM merging across nodes test

2021-09-03T16:58:18Z

Add check_ksm_numa_merge() function to test that pages in different NUMA nodes are being handled properly. First, two duplicate pages are allocated in two separate NUMA nodes using the libnuma library. Since there is one unique page in each node, with merge_across_nodes = 0, there won't be any shared pages. If merge_across_nodes is set to 1, the pages will be treated as usual duplicate pages and will be merged. If NUMA config is not enabled or the number of NUMA nodes is less than two, then the test is skipped. The test is run as follows: ./ksm_tests -N Link: https://lkml.kernel.org/r/071c17b5b04ebb0dfeba137acc495e5dd9d2a719.1626252248.git.zhansayabagdaulet@gmail.com Signed-off-by: Zhansaya Bagdauletkyzy Reviewed-by: Pavel Tatashin Reviewed-by: Tyler Hicks Cc: Hugh Dickins Cc: Shuah Khan Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

selftests: vm: add KSM merge test

2021-09-03T16:58:18Z

Patch series "add KSM selftests". Introduce selftests to validate the functionality of KSM. The tests are run on private anonymous pages. Since some KSM tunables are modified, their starting values are saved and restored after testing. At the start, run is set to 2 to ensure that only test pages will be merged (we assume that no applications make madvise syscalls in the background). If KSM config not enabled, all tests will be skipped. This patch (of 4): Add check_ksm_merge() function to check the basic merging feature of KSM. First, some number of identical pages are allocated and the MADV_MERGEABLE advice is given to merge these pages. Then, pages_shared and pages_sharing values are compared with the expected numbers using assert_ksm_pages_count() function. The number of pages can be changed using -p option. Link: https://lkml.kernel.org/r/cover.1626252248.git.zhansayabagdaulet@gmail.com Link: https://lkml.kernel.org/r/90287685c13300972ea84de93d1f3f900373f9fe.1626252248.git.zhansayabagdaulet@gmail.com Signed-off-by: Zhansaya Bagdauletkyzy Reviewed-by: Pavel Tatashin Reviewed-by: Tyler Hicks Cc: Shuah Khan Cc: Hugh Dickins Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds