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authorRalph Campbell <rcampbell@nvidia.com>2020-08-12 04:31:45 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2020-08-12 20:57:56 +0300
commitb0fc0f3fca80cf8ea8631eaec6b922bca4c4c2dd (patch)
tree6ba91fbab42f13d50fba655f87cafcb32c0c74c6 /tools
parent0744f2807a4ffb111a31c0769878ec8b125b5241 (diff)
downloadlinux-b0fc0f3fca80cf8ea8631eaec6b922bca4c4c2dd.tar.xz
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 'tools')
-rw-r--r--tools/testing/selftests/vm/hmm-tests.c35
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)