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author | Linus Torvalds <torvalds@linux-foundation.org> | 2019-12-02 05:36:41 +0100 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-12-02 05:36:41 +0100 |
commit | 596cf45cbf6e4fa7bcb0df33e373a7d062b644b5 (patch) | |
tree | 3f24095d65cbdaaae8e89ff02b87df373ada1bfb /tools | |
parent | Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net (diff) | |
parent | mm/page_io.c: annotate refault stalls from swap_readpage (diff) | |
download | linux-596cf45cbf6e4fa7bcb0df33e373a7d062b644b5.tar.xz linux-596cf45cbf6e4fa7bcb0df33e373a7d062b644b5.zip |
Merge branch 'akpm' (patches from Andrew)
Merge updates from Andrew Morton:
"Incoming:
- a small number of updates to scripts/, ocfs2 and fs/buffer.c
- most of MM
I still have quite a lot of material (mostly not MM) staged after
linux-next due to -next dependencies. I'll send those across next week
as the preprequisites get merged up"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (135 commits)
mm/page_io.c: annotate refault stalls from swap_readpage
mm/Kconfig: fix trivial help text punctuation
mm/Kconfig: fix indentation
mm/memory_hotplug.c: remove __online_page_set_limits()
mm: fix typos in comments when calling __SetPageUptodate()
mm: fix struct member name in function comments
mm/shmem.c: cast the type of unmap_start to u64
mm: shmem: use proper gfp flags for shmem_writepage()
mm/shmem.c: make array 'values' static const, makes object smaller
userfaultfd: require CAP_SYS_PTRACE for UFFD_FEATURE_EVENT_FORK
fs/userfaultfd.c: wp: clear VM_UFFD_MISSING or VM_UFFD_WP during userfaultfd_register()
userfaultfd: wrap the common dst_vma check into an inlined function
userfaultfd: remove unnecessary WARN_ON() in __mcopy_atomic_hugetlb()
userfaultfd: use vma_pagesize for all huge page size calculation
mm/madvise.c: use PAGE_ALIGN[ED] for range checking
mm/madvise.c: replace with page_size() in madvise_inject_error()
mm/mmap.c: make vma_merge() comment more easy to understand
mm/hwpoison-inject: use DEFINE_DEBUGFS_ATTRIBUTE to define debugfs fops
autonuma: reduce cache footprint when scanning page tables
autonuma: fix watermark checking in migrate_balanced_pgdat()
...
Diffstat (limited to 'tools')
-rw-r--r-- | tools/testing/selftests/memfd/memfd_test.c | 36 | ||||
-rw-r--r-- | tools/testing/selftests/vm/config | 1 |
2 files changed, 37 insertions, 0 deletions
diff --git a/tools/testing/selftests/memfd/memfd_test.c b/tools/testing/selftests/memfd/memfd_test.c index c67d32eeb668..334a7eea2004 100644 --- a/tools/testing/selftests/memfd/memfd_test.c +++ b/tools/testing/selftests/memfd/memfd_test.c @@ -290,6 +290,40 @@ static void mfd_assert_read_shared(int fd) munmap(p, mfd_def_size); } +static void mfd_assert_fork_private_write(int fd) +{ + int *p; + pid_t pid; + + p = mmap(NULL, + mfd_def_size, + PROT_READ | PROT_WRITE, + MAP_PRIVATE, + fd, + 0); + if (p == MAP_FAILED) { + printf("mmap() failed: %m\n"); + abort(); + } + + p[0] = 22; + + pid = fork(); + if (pid == 0) { + p[0] = 33; + exit(0); + } else { + waitpid(pid, NULL, 0); + + if (p[0] != 22) { + printf("MAP_PRIVATE copy-on-write failed: %m\n"); + abort(); + } + } + + munmap(p, mfd_def_size); +} + static void mfd_assert_write(int fd) { ssize_t l; @@ -760,6 +794,8 @@ static void test_seal_future_write(void) mfd_assert_read_shared(fd2); mfd_fail_write(fd2); + mfd_assert_fork_private_write(fd); + munmap(p, mfd_def_size); close(fd2); close(fd); diff --git a/tools/testing/selftests/vm/config b/tools/testing/selftests/vm/config index 1c0d76cb5adf..93b90a9b1eeb 100644 --- a/tools/testing/selftests/vm/config +++ b/tools/testing/selftests/vm/config @@ -1,2 +1,3 @@ CONFIG_SYSVIPC=y CONFIG_USERFAULTFD=y +CONFIG_TEST_VMALLOC=m |