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[216.228.112.22]) by smtp.gmail.com with ESMTPSA id b26sm7616844pgn.4.2019.03.22.13.09.31 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Fri, 22 Mar 2019 13:09:31 -0700 (PDT) Date: Fri, 22 Mar 2019 13:09:26 -0700 From: Nicolin Chen To: Catalin Marinas Subject: Re: [PATCH v2 RFC/RFT] dma-contiguous: Get normal pages for single-page allocations Message-ID: <20190322200925.GA22219@Asurada-Nvidia> References: <20190305183202.16216-1-nicoleotsuka@gmail.com> <20190319144301.GG59586@arrakis.emea.arm.com> <20190321233248.GA6941@Asurada-Nvidia> <20190322105712.GB13384@arrakis.emea.arm.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20190322105712.GB13384@arrakis.emea.arm.com> User-Agent: Mutt/1.9.4 (2018-02-28) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190322_130933_025091_E7313277 X-CRM114-Status: GOOD ( 12.56 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: chris@zankel.net, linux-xtensa@linux-xtensa.org, dwmw2@infradead.org, joro@8bytes.org, will.deacon@arm.com, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, jonathanh@nvidia.com, jcmvbkbc@gmail.com, robin.murphy@arm.com, hch@lst.de, linux-arm-kernel@lists.infradead.org, m.szyprowski@samsung.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Catalin, On Fri, Mar 22, 2019 at 10:57:13AM +0000, Catalin Marinas wrote: > > > Do you have any numbers to back this up? You don't seem to address > > > dma_direct_alloc() either but, as I said above, it's not trivial since > > > some platforms expect certain physical range for DMA allocations. > > > > What's the dma_direct_alloc() here about? Mind elaborating? > > I just did a grep for dma_alloc_from_contiguous() in the 5.1-rc1 kernel > and came up with __dma_direct_alloc_pages(). Should your patch cover > this as well? I don't get the meaning of "cover this" here. What missing part do you refer to? _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel