The patch titled
Subject: mm/migrate: add migrate-shared test for migrate_vma_*()
has been added to the -mm tree. Its filename is
mm-migrate-add-migrate-shared-test-for-migrate_vma_.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-migrate-add-migrate-shared-test-for-migrate_vma_.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-migrate-add-migrate-shared-test-for-migrate_vma_.patch
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------------------------------------------------------
From: Ralph Campbell <rcampbell@xxxxxxxxxx>
Subject: 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.
Link: http://lkml.kernel.org/r/20200709165711.26584-3-rcampbell@xxxxxxxxxx
Signed-off-by: Ralph Campbell <rcampbell@xxxxxxxxxx>
Cc: Jerome Glisse <jglisse@xxxxxxxxxx>
Cc: John Hubbard <jhubbard@xxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: Jason Gunthorpe <jgg@xxxxxxxxxxxx>
Cc: "Bharata B Rao" <bharata@xxxxxxxxxxxxx>
Cc: Shuah Khan <shuah@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
tools/testing/selftests/vm/hmm-tests.c | 35 +++++++++++++++++++++++
1 file changed, 35 insertions(+)
--- a/tools/testing/selftests/vm/hmm-tests.c~mm-migrate-add-migrate-shared-test-for-migrate_vma_
+++ a/tools/testing/selftests/vm/hmm-tests.c
@@ -932,6 +932,41 @@ 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)
_
Patches currently in -mm which might be from rcampbell@xxxxxxxxxx are
mm-remove-redundant-check-non_swap_entry.patch
mm-migrate-optimize-migrate_vma_setup-for-holes.patch
mm-migrate-add-migrate-shared-test-for-migrate_vma_.patch
