From: Ralph Campbell <rcampbell@nvidia.com> To: <linux-mm@kvack.org>, <kvm-ppc@vger.kernel.org>, <linux-kselftest@vger.kernel.org>, <linux-kernel@vger.kernel.org> Cc: Jerome Glisse <jglisse@redhat.com>, John Hubbard <jhubbard@nvidia.com>, Christoph Hellwig <hch@lst.de>, Jason Gunthorpe <jgg@mellanox.com>, "Bharata B Rao" <bharata@linux.ibm.com>, Shuah Khan <shuah@kernel.org>, Andrew Morton <akpm@linux-foundation.org>, Ralph Campbell <rcampbell@nvidia.com> Subject: [PATCH v2 2/2] mm/migrate: add migrate-shared test for migrate_vma_*() Date: Fri, 10 Jul 2020 12:48:40 -0700 [thread overview] Message-ID: <20200710194840.7602-3-rcampbell@nvidia.com> (raw) In-Reply-To: <20200710194840.7602-1-rcampbell@nvidia.com> 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> --- tools/testing/selftests/vm/hmm-tests.c | 35 ++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) diff --git a/tools/testing/selftests/vm/hmm-tests.c b/tools/testing/selftests/vm/hmm-tests.c index 79db22604019..e83d3ab37697 100644 --- a/tools/testing/selftests/vm/hmm-tests.c +++ b/tools/testing/selftests/vm/hmm-tests.c @@ -931,6 +931,41 @@ TEST_F(hmm, migrate_fault) hmm_buffer_free(buffer); } +/* + * 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. */ -- 2.20.1
WARNING: multiple messages have this Message-ID (diff)
From: Ralph Campbell <rcampbell@nvidia.com> To: linux-mm@kvack.org, kvm-ppc@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Jerome Glisse <jglisse@redhat.com>, John Hubbard <jhubbard@nvidia.com>, Christoph Hellwig <hch@lst.de>, Jason Gunthorpe <jgg@mellanox.com>, Bharata B Rao <bharata@linux.ibm.com>, Shuah Khan <shuah@kernel.org>, Andrew Morton <akpm@linux-foundation.org>, Ralph Campbell <rcampbell@nvidia.com> Subject: [PATCH v2 2/2] mm/migrate: add migrate-shared test for migrate_vma_*() Date: Fri, 10 Jul 2020 19:48:40 +0000 [thread overview] Message-ID: <20200710194840.7602-3-rcampbell@nvidia.com> (raw) In-Reply-To: <20200710194840.7602-1-rcampbell@nvidia.com> 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> --- tools/testing/selftests/vm/hmm-tests.c | 35 ++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) diff --git a/tools/testing/selftests/vm/hmm-tests.c b/tools/testing/selftests/vm/hmm-tests.c index 79db22604019..e83d3ab37697 100644 --- a/tools/testing/selftests/vm/hmm-tests.c +++ b/tools/testing/selftests/vm/hmm-tests.c @@ -931,6 +931,41 @@ TEST_F(hmm, migrate_fault) hmm_buffer_free(buffer); } +/* + * 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. */ -- 2.20.1
next prev parent reply other threads:[~2020-07-10 19:49 UTC|newest] Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-07-10 19:48 [PATCH v2 0/2] mm/migrate: optimize migrate_vma_setup() for holes Ralph Campbell 2020-07-10 19:48 ` Ralph Campbell 2020-07-10 19:48 ` [PATCH v2 1/2] " Ralph Campbell 2020-07-10 19:48 ` Ralph Campbell 2020-07-10 19:48 ` Ralph Campbell [this message] 2020-07-10 19:48 ` [PATCH v2 2/2] mm/migrate: add migrate-shared test for migrate_vma_*() Ralph Campbell
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