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(mtr-vdi-031.wap.labs.mlnx [10.209.102.136]) by labmailer.mlnx (8.13.8/8.13.8) with ESMTP id 04JE63xo006590; Tue, 19 May 2020 17:06:04 +0300 From: Max Gurtovoy To: sagi@grimberg.me, linux-nvme@lists.infradead.org, kbusch@kernel.org, hch@lst.de, martin.petersen@oracle.com, jsmart2021@gmail.com, axboe@kernel.dk Subject: [PATCH 07/16] nvme: introduce NVME_INLINE_METADATA_SG_CNT Date: Tue, 19 May 2020 17:05:54 +0300 Message-Id: <20200519140603.166576-8-maxg@mellanox.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20200519140603.166576-1-maxg@mellanox.com> References: <20200519140603.166576-1-maxg@mellanox.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200519_150616_133448_98204547 X-CRM114-Status: UNSURE ( 9.93 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: vladimirk@mellanox.com, shlomin@mellanox.com, israelr@mellanox.com, James Smart , idanb@mellanox.com, oren@mellanox.com, Max Gurtovoy , nitzanc@mellanox.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org From: Israel Rukshin SGL size of metadata is usually small. Thus, 1 inline sg should cover most cases. The macro will be used for pre-allocate a single SGL entry for metadata. The preallocation of small inline SGLs depends on SG_CHAIN capability so if the ARCH doesn't support SG_CHAIN, use the runtime allocation for the SGL. This patch is a preparation for adding metadata (T10-PI) over fabric support. Signed-off-by: Israel Rukshin Signed-off-by: Max Gurtovoy Reviewed-by: Martin K. Petersen Reviewed-by: Christoph Hellwig Reviewed-by: James Smart --- drivers/nvme/host/nvme.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index 6c7e76c..7c2e6d4 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -31,8 +31,10 @@ #ifdef CONFIG_ARCH_NO_SG_CHAIN #define NVME_INLINE_SG_CNT 0 +#define NVME_INLINE_METADATA_SG_CNT 0 #else #define NVME_INLINE_SG_CNT 2 +#define NVME_INLINE_METADATA_SG_CNT 1 #endif extern struct workqueue_struct *nvme_wq; -- 1.8.3.1 _______________________________________________ linux-nvme mailing list linux-nvme@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-nvme