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| author |   Ralph Campbell <rcampbell@nvidia.com> | 2020-08-11 18:31:45 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2020-08-12 10:57:56 -0700 |
| commit | b0fc0f3fca80cf8ea8631eaec6b922bca4c4c2dd (patch) | |
| tree | 6ba91fbab42f13d50fba655f87cafcb32c0c74c6 /tools/testing/selftests/vm/hmm-tests.c | |
| parent | mm/migrate: optimize migrate_vma_setup() for holes (diff) | |
| download | wireguard-linux-b0fc0f3fca80cf8ea8631eaec6b922bca4c4c2dd.tar.xz wireguard-linux-b0fc0f3fca80cf8ea8631eaec6b922bca4c4c2dd.zip | |
mm/migrate: add migrate-shared test for migrate_vma_*()
Add a migrate_vma_*() self test for mmap(MAP_SHARED) to verify that
!vma_anonymous() ranges won't be migrated.
Signed-off-by: Ralph Campbell <rcampbell@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Jason Gunthorpe <jgg@mellanox.com>
Cc: "Bharata B Rao" <bharata@linux.ibm.com>
Cc: Shuah Khan <shuah@kernel.org>
Link: http://lkml.kernel.org/r/20200710194840.7602-3-rcampbell@nvidia.com
Link: http://lkml.kernel.org/r/20200709165711.26584-3-rcampbell@nvidia.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to '')
| -rw-r--r-- | tools/testing/selftests/vm/hmm-tests.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/tools/testing/selftests/vm/hmm-tests.c b/tools/testing/selftests/vm/hmm-tests.c index 91d38a29956b..93fc5cadce61 100644 --- a/tools/testing/selftests/vm/hmm-tests.c +++ b/tools/testing/selftests/vm/hmm-tests.c @@ -942,6 +942,41 @@ TEST_F(hmm, migrate_fault) } /* + * Migrate anonymous shared memory to device private memory. + */ +TEST_F(hmm, migrate_shared) +{ + struct hmm_buffer *buffer; + unsigned long npages; + unsigned long size; + int ret; + + npages = ALIGN(HMM_BUFFER_SIZE, self->page_size) >> self->page_shift; + ASSERT_NE(npages, 0); + size = npages << self->page_shift; + + buffer = malloc(sizeof(*buffer)); + ASSERT_NE(buffer, NULL); + + buffer->fd = -1; + buffer->size = size; + buffer->mirror = malloc(size); + ASSERT_NE(buffer->mirror, NULL); + + buffer->ptr = mmap(NULL, size, + PROT_READ | PROT_WRITE, + MAP_SHARED | MAP_ANONYMOUS, + buffer->fd, 0); + ASSERT_NE(buffer->ptr, MAP_FAILED); + + /* Migrate memory to device. */ + ret = hmm_dmirror_cmd(self->fd, HMM_DMIRROR_MIGRATE, buffer, npages); + ASSERT_EQ(ret, -ENOENT); + + hmm_buffer_free(buffer); +} + +/* * Try to migrate various memory types to device private memory. */ TEST_F(hmm2, migrate_mixed) |