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[66.187.233.206]) by smtp.gmail.com with ESMTPSA id q8sm758906qta.31.2019.10.30.11.34.40 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 30 Oct 2019 11:34:41 -0700 (PDT) Message-ID: <1572460479.5937.102.camel@lca.pw> Subject: Re: [PATCH v3 3/3] mm/hmm/test: add self tests for HMM From: Qian Cai To: Jason Gunthorpe , Ralph Campbell Cc: Jerome Glisse , John Hubbard , Christoph Hellwig , "linux-rdma@vger.kernel.org" , "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" Date: Wed, 30 Oct 2019 14:34:39 -0400 In-Reply-To: <20191029175837.GS22766@mellanox.com> References: <20191023195515.13168-1-rcampbell@nvidia.com> <20191023195515.13168-4-rcampbell@nvidia.com> <20191029175837.GS22766@mellanox.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.22.6 (3.22.6-10.el7) Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org On Tue, 2019-10-29 at 17:58 +0000, Jason Gunthorpe wrote: > On Wed, Oct 23, 2019 at 12:55:15PM -0700, Ralph Campbell wrote: > > Add self tests for HMM. > > > > Signed-off-by: Ralph Campbell > > --- > > MAINTAINERS | 3 + > > drivers/char/Kconfig | 11 + > > drivers/char/Makefile | 1 + > > drivers/char/hmm_dmirror.c | 1566 ++++++++++++++++++++++++ > > include/Kbuild | 1 + > > include/uapi/linux/hmm_dmirror.h | 74 ++ > > tools/testing/selftests/vm/.gitignore | 1 + > > tools/testing/selftests/vm/Makefile | 3 + > > tools/testing/selftests/vm/config | 3 + > > tools/testing/selftests/vm/hmm-tests.c | 1311 ++++++++++++++++++++ > > tools/testing/selftests/vm/run_vmtests | 16 + > > tools/testing/selftests/vm/test_hmm.sh | 97 ++ > > 12 files changed, 3087 insertions(+) > > create mode 100644 drivers/char/hmm_dmirror.c > > create mode 100644 include/uapi/linux/hmm_dmirror.h > > create mode 100644 tools/testing/selftests/vm/hmm-tests.c > > create mode 100755 tools/testing/selftests/vm/test_hmm.sh > > This is really big, it would be nice to get a comment from the various > kernel testing folks if this approach makes sense with the test > frameworks. Do we have other drivers that are only intended to be used > by selftests? > > Frankly, I'm not super excited about the idea of a 'test driver', it > seems more logical for testing to have some way for a test harness to > call hmm_range_fault() under various conditions and check the results? Not a big fan of those selftests either. Could it be saner to use the new KUnit framework for those instead?