From: Max Gurtovoy <maxg@mellanox.com>
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
Cc: vladimirk@mellanox.com, shlomin@mellanox.com,
israelr@mellanox.com, James Smart <james.smart@broadcom.com>,
idanb@mellanox.com, oren@mellanox.com,
Max Gurtovoy <maxg@mellanox.com>,
nitzanc@mellanox.com
Subject: [PATCH 07/16] nvme: introduce NVME_INLINE_METADATA_SG_CNT
Date: Tue, 19 May 2020 17:05:54 +0300 [thread overview]
Message-ID: <20200519140603.166576-8-maxg@mellanox.com> (raw)
In-Reply-To: <20200519140603.166576-1-maxg@mellanox.com>
From: Israel Rukshin <israelr@mellanox.com>
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 <israelr@mellanox.com>
Signed-off-by: Max Gurtovoy <maxg@mellanox.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: James Smart <james.smart@broadcom.com>
---
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
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next prev parent reply other threads:[~2020-05-19 14:07 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-19 14:05 [PATCH 00/16 v8] nvme-rdma/nvmet-rdma: Add metadata/T10-PI support Max Gurtovoy
2020-05-19 14:05 ` [PATCH 01/16] block: always define struct blk_integrity in genhd.h Max Gurtovoy
2020-05-19 14:05 ` [PATCH 02/16] nvme: introduce namespace features flag Max Gurtovoy
2020-05-19 14:05 ` [PATCH 03/16] nvme: introduce NVME_NS_METADATA_SUPPORTED flag Max Gurtovoy
2020-05-19 14:05 ` [PATCH 04/16] nvme: make nvme_ns_has_pi accessible to transports Max Gurtovoy
2020-05-19 14:05 ` [PATCH 05/16] nvme: introduce max_integrity_segments ctrl attribute Max Gurtovoy
2020-05-19 14:05 ` [PATCH 06/16] nvme: enforce extended LBA format for fabrics metadata Max Gurtovoy
2020-05-19 14:05 ` Max Gurtovoy [this message]
2020-05-19 14:05 ` [PATCH 08/16] nvme-rdma: introduce nvme_rdma_sgl structure Max Gurtovoy
2020-05-19 14:05 ` [PATCH 09/16] nvme-rdma: add metadata/T10-PI support Max Gurtovoy
2020-05-19 14:05 ` [PATCH 10/16] nvmet: add metadata characteristics for a namespace Max Gurtovoy
2020-05-19 14:05 ` [PATCH 11/16] nvmet: rename nvmet_rw_len to nvmet_rw_data_len Max Gurtovoy
2020-05-19 14:05 ` [PATCH 12/16] nvmet: rename nvmet_check_data_len to nvmet_check_transfer_len Max Gurtovoy
2020-05-19 14:06 ` [PATCH 13/16] nvme: add Metadata Capabilities enumerations Max Gurtovoy
2020-05-19 14:06 ` [PATCH 14/16] nvmet: add metadata/T10-PI support Max Gurtovoy
2020-05-19 14:06 ` [PATCH 15/16] nvmet: add metadata support for block devices Max Gurtovoy
2020-05-19 14:06 ` [PATCH 16/16] nvmet-rdma: add metadata/T10-PI support Max Gurtovoy
2020-05-20 17:12 ` [PATCH 00/16 v8] nvme-rdma/nvmet-rdma: Add " Christoph Hellwig
-- strict thread matches above, loose matches on Subject: below --
2020-05-04 15:57 [PATCH 00/16 v7] " Max Gurtovoy
2020-05-04 15:57 ` [PATCH 07/16] nvme: introduce NVME_INLINE_METADATA_SG_CNT Max Gurtovoy
2020-05-13 19:05 ` James Smart
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