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[142.68.25.194]) by smtp.gmail.com with ESMTPSA id w9-20020ac87189000000b00403eab8b7cesm3395763qto.16.2023.07.24.09.33.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 24 Jul 2023 09:33:34 -0700 (PDT) Received: from jgg by wakko with local (Exim 4.95) (envelope-from ) id 1qNyV3-000K4o-R3; Mon, 24 Jul 2023 13:33:33 -0300 Date: Mon, 24 Jul 2023 13:33:33 -0300 From: Jason Gunthorpe To: Tanmay Jagdale Cc: will@kernel.org, robin.murphy@arm.com, joro@8bytes.org, baolu.lu@linux.intel.com, thunder.leizhen@huawei.com, linux-arm-kernel@lists.infradead.org, iommu@lists.linux.dev, linux-kernel@vger.kernel.org, gcherian@marvell.com, sgoutham@marvell.com, lcherian@marvell.com, bbhushan2@marvell.com Subject: Re: [RESEND PATCH 0/4] Add support for SMMU ECMDQ Message-ID: References: <20230721063513.33431-1-tanmay@marvell.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230721063513.33431-1-tanmay@marvell.com> X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_BLOCKED, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jul 21, 2023 at 02:35:09AM -0400, Tanmay Jagdale wrote: > Resending the patches by Zhen Lei that add > support for SMMU's ECMDQ feature. > > I have tested these patches on Marvell SoC that has the ECMDQ > feature. Last time this came up Robin was interested in real world performance gains Do you have data to share that is motivating you to do this work? Jason