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[142.162.113.180]) by smtp.gmail.com with ESMTPSA id o3sm18630496qtf.84.2019.11.12.12.29.28 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Tue, 12 Nov 2019 12:29:28 -0800 (PST) Received: from jgg by mlx.ziepe.ca with local (Exim 4.90_1) (envelope-from ) id 1iUcn1-0003pu-NI; Tue, 12 Nov 2019 16:29:27 -0400 Date: Tue, 12 Nov 2019 16:29:27 -0400 From: Jason Gunthorpe To: John Hubbard Cc: Andrew Morton , Ira Weiny , linux-rdma@vger.kernel.org, linux-mm@kvack.org, LKML Subject: Re: [PATCH 1/1] IB/umem: use get_user_pages_fast() to pin DMA pages Message-ID: <20191112202927.GC5584@ziepe.ca> References: <20191109020434.389855-1-jhubbard@nvidia.com> <20191109020434.389855-2-jhubbard@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20191109020434.389855-2-jhubbard@nvidia.com> User-Agent: Mutt/1.9.4 (2018-02-28) X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Fri, Nov 08, 2019 at 06:04:34PM -0800, John Hubbard wrote: > And get rid of the mmap_sem calls, as part of that. Note > that get_user_pages_fast() will, if necessary, fall back to > __gup_longterm_unlocked(), which takes the mmap_sem as needed. > > Cc: Jason Gunthorpe > Cc: Ira Weiny > Signed-off-by: John Hubbard > --- > drivers/infiniband/core/umem.c | 17 ++++++----------- > 1 file changed, 6 insertions(+), 11 deletions(-) Reviewed-by: Jason Gunthorpe This can go through Andrew's tree if he takes this larger series, otherwise I'll grab it Thanks, Jason