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author | Mike Rapoport <rppt@linux.vnet.ibm.com> | 2017-02-22 15:43:46 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-02-22 16:41:29 -0800 |
commit | 419624daf0e827452837177c4b983dc0f1b6429f (patch) | |
tree | 9785e74b08bc9aea0371787d5287f81c96685756 /tools | |
parent | 1c9e8def43a3452e7af658b340f5f4f4ecde5c38 (diff) | |
download | linux-419624daf0e827452837177c4b983dc0f1b6429f.tar.gz linux-419624daf0e827452837177c4b983dc0f1b6429f.tar.bz2 linux-419624daf0e827452837177c4b983dc0f1b6429f.zip |
userfaultfd: shmem: add userfaultfd_shmem test
The test verifies that anonymous shared mapping can be used with userfault
using the existing testing method. The shared memory area is allocated
using mmap(..., MAP_SHARED | MAP_ANONYMOUS, ...) and released using
madvise(MADV_REMOVE)
Link: http://lkml.kernel.org/r/20161216144821.5183-35-aarcange@redhat.com
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Cc: Hillf Danton <hillf.zj@alibaba-inc.com>
Cc: Michael Rapoport <RAPOPORT@il.ibm.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'tools')
-rw-r--r-- | tools/testing/selftests/vm/Makefile | 4 | ||||
-rwxr-xr-x | tools/testing/selftests/vm/run_vmtests | 11 | ||||
-rw-r--r-- | tools/testing/selftests/vm/userfaultfd.c | 37 |
3 files changed, 50 insertions, 2 deletions
diff --git a/tools/testing/selftests/vm/Makefile b/tools/testing/selftests/vm/Makefile index 0114aac78e1f..900dfaf81051 100644 --- a/tools/testing/selftests/vm/Makefile +++ b/tools/testing/selftests/vm/Makefile @@ -11,6 +11,7 @@ BINARIES += thuge-gen BINARIES += transhuge-stress BINARIES += userfaultfd BINARIES += userfaultfd_hugetlb +BINARIES += userfaultfd_shmem BINARIES += mlock-random-test all: $(BINARIES) @@ -22,6 +23,9 @@ userfaultfd: userfaultfd.c ../../../../usr/include/linux/kernel.h userfaultfd_hugetlb: userfaultfd.c ../../../../usr/include/linux/kernel.h $(CC) $(CFLAGS) -DHUGETLB_TEST -O2 -o $@ $< -lpthread +userfaultfd_shmem: userfaultfd.c ../../../../usr/include/linux/kernel.h + $(CC) $(CFLAGS) -DSHMEM_TEST -O2 -o $@ $< -lpthread + mlock-random-test: mlock-random-test.c $(CC) $(CFLAGS) -o $@ $< -lcap diff --git a/tools/testing/selftests/vm/run_vmtests b/tools/testing/selftests/vm/run_vmtests index 14d697ee00c4..c92f6cf31d0a 100755 --- a/tools/testing/selftests/vm/run_vmtests +++ b/tools/testing/selftests/vm/run_vmtests @@ -116,6 +116,17 @@ else fi rm -f $mnt/ufd_test_file +echo "----------------------------" +echo "running userfaultfd_shmem" +echo "----------------------------" +./userfaultfd_shmem 128 32 +if [ $? -ne 0 ]; then + echo "[FAIL]" + exitcode=1 +else + echo "[PASS]" +fi + #cleanup umount $mnt rm -rf $mnt diff --git a/tools/testing/selftests/vm/userfaultfd.c b/tools/testing/selftests/vm/userfaultfd.c index d753a9161411..a5e5808c86cd 100644 --- a/tools/testing/selftests/vm/userfaultfd.c +++ b/tools/testing/selftests/vm/userfaultfd.c @@ -101,8 +101,9 @@ pthread_attr_t attr; ~(unsigned long)(sizeof(unsigned long long) \ - 1))) -#ifndef HUGETLB_TEST +#if !defined(HUGETLB_TEST) && !defined(SHMEM_TEST) +/* Anonymous memory */ #define EXPECTED_IOCTLS ((1 << _UFFDIO_WAKE) | \ (1 << _UFFDIO_COPY) | \ (1 << _UFFDIO_ZEROPAGE)) @@ -127,10 +128,13 @@ static void allocate_area(void **alloc_area) } } -#else /* HUGETLB_TEST */ +#else /* HUGETLB_TEST or SHMEM_TEST */ #define EXPECTED_IOCTLS UFFD_API_RANGE_IOCTLS_BASIC +#ifdef HUGETLB_TEST + +/* HugeTLB memory */ static int release_pages(char *rel_area) { int ret = 0; @@ -162,8 +166,37 @@ static void allocate_area(void **alloc_area) huge_fd_off0 = *alloc_area; } +#elif defined(SHMEM_TEST) + +/* Shared memory */ +static int release_pages(char *rel_area) +{ + int ret = 0; + + if (madvise(rel_area, nr_pages * page_size, MADV_REMOVE)) { + perror("madvise"); + ret = 1; + } + + return ret; +} + +static void allocate_area(void **alloc_area) +{ + *alloc_area = mmap(NULL, nr_pages * page_size, PROT_READ | PROT_WRITE, + MAP_ANONYMOUS | MAP_SHARED, -1, 0); + if (*alloc_area == MAP_FAILED) { + fprintf(stderr, "shared memory mmap failed\n"); + *alloc_area = NULL; + } +} + +#else /* SHMEM_TEST */ +#error "Undefined test type" #endif /* HUGETLB_TEST */ +#endif /* !defined(HUGETLB_TEST) && !defined(SHMEM_TEST) */ + static int my_bcmp(char *str1, char *str2, size_t n) { unsigned long i; |