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From: Max Gurtovoy <maxg@mellanox.com>
To: maxg@mellanox.com, linux-nvme@lists.infradead.org,
	kbusch@kernel.org, hch@lst.de, sagi@grimberg.me,
	martin.petersen@oracle.com, jsmart2021@gmail.com,
	axboe@kernel.dk
Cc: vladimirk@mellanox.com, shlomin@mellanox.com,
	israelr@mellanox.com, idanb@mellanox.com, oren@mellanox.com,
	nitzanc@mellanox.com
Subject: [PATCH 07/16] nvme: introduce NVME_INLINE_METADATA_SG_CNT
Date: Mon,  4 May 2020 18:57:46 +0300	[thread overview]
Message-ID: <20200504155755.221125-8-maxg@mellanox.com> (raw)
In-Reply-To: <20200504155755.221125-1-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>
---
 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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  parent reply	other threads:[~2020-05-04 15:58 UTC|newest]

Thread overview: 57+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-04 15:57 [PATCH 00/16 v7] nvme-rdma/nvmet-rdma: Add metadata/T10-PI support Max Gurtovoy
2020-05-04 15:57 ` [PATCH 01/16] block: always define struct blk_integrity in genhd.h Max Gurtovoy
2020-05-14  2:51   ` Martin K. Petersen
2020-05-04 15:57 ` [PATCH 02/16] nvme: introduce namespace features flag Max Gurtovoy
2020-05-04 23:59   ` James Smart
2020-05-14  2:52   ` Martin K. Petersen
2020-05-04 15:57 ` [PATCH 03/16] nvme: introduce NVME_NS_METADATA_SUPPORTED flag Max Gurtovoy
2020-05-05 23:33   ` James Smart
2020-05-06  8:39     ` Max Gurtovoy
2020-05-06 20:44       ` James Smart
2020-05-07  9:02         ` Max Gurtovoy
2020-05-11 23:50           ` James Smart
2020-05-13 18:18             ` Christoph Hellwig
2020-05-13 19:53               ` James Smart
2020-05-14  2:53   ` Martin K. Petersen
2020-05-04 15:57 ` [PATCH 04/16] nvme: make nvme_ns_has_pi accessible to transports Max Gurtovoy
2020-05-14  2:53   ` Martin K. Petersen
2020-05-04 15:57 ` [PATCH 05/16] nvme: introduce max_integrity_segments ctrl attribute Max Gurtovoy
2020-05-05 23:51   ` James Smart
2020-05-06  7:08     ` Christoph Hellwig
2020-05-13 19:04   ` James Smart
2020-05-04 15:57 ` [PATCH 06/16] nvme: enforce extended LBA format for fabrics metadata Max Gurtovoy
2020-05-13 19:03   ` James Smart
2020-05-14  2:56     ` Martin K. Petersen
2020-05-14  8:28       ` Max Gurtovoy
2020-05-14  8:15     ` Max Gurtovoy
2020-05-04 15:57 ` Max Gurtovoy [this message]
2020-05-13 19:05   ` [PATCH 07/16] nvme: introduce NVME_INLINE_METADATA_SG_CNT James Smart
2020-05-04 15:57 ` [PATCH 08/16] nvme-rdma: introduce nvme_rdma_sgl structure Max Gurtovoy
2020-05-04 15:57 ` [PATCH 09/16] nvme-rdma: add metadata/T10-PI support Max Gurtovoy
2020-05-05  6:12   ` Christoph Hellwig
2020-05-14  3:02   ` Martin K. Petersen
2020-05-14  8:48     ` Max Gurtovoy
2020-05-14 22:40       ` Martin K. Petersen
2020-05-15 14:50         ` Max Gurtovoy
2020-05-18 17:22           ` Martin K. Petersen
2020-05-04 15:57 ` [PATCH 10/16] nvmet: add metadata characteristics for a namespace Max Gurtovoy
2020-05-13 19:25   ` James Smart
2020-05-14  3:06     ` Martin K. Petersen
2020-05-04 15:57 ` [PATCH 11/16] nvmet: rename nvmet_rw_len to nvmet_rw_data_len Max Gurtovoy
2020-05-13 19:25   ` James Smart
2020-05-04 15:57 ` [PATCH 12/16] nvmet: rename nvmet_check_data_len to nvmet_check_transfer_len Max Gurtovoy
2020-05-13 19:27   ` James Smart
2020-05-04 15:57 ` [PATCH 13/16] nvme: add Metadata Capabilities enumerations Max Gurtovoy
2020-05-13 19:27   ` James Smart
2020-05-14  3:07   ` Martin K. Petersen
2020-05-04 15:57 ` [PATCH 14/16] nvmet: add metadata/T10-PI support Max Gurtovoy
2020-05-13 19:51   ` James Smart
2020-05-14 15:09     ` Max Gurtovoy
2020-05-14 15:37       ` James Smart
2020-05-04 15:57 ` [PATCH 15/16] nvmet: add metadata support for block devices Max Gurtovoy
2020-05-04 15:57 ` [PATCH 16/16] nvmet-rdma: add metadata/T10-PI support Max Gurtovoy
2020-05-14  3:10   ` Martin K. Petersen
2020-05-14  8:55     ` Max Gurtovoy
2020-05-05  6:13 ` [PATCH 00/16 v7] nvme-rdma/nvmet-rdma: Add " Christoph Hellwig
2020-05-14 15:55   ` Max Gurtovoy
2020-05-19 14:05 [PATCH 00/16 v8] " Max Gurtovoy
2020-05-19 14:05 ` [PATCH 07/16] nvme: introduce NVME_INLINE_METADATA_SG_CNT Max Gurtovoy

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