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From: Leon Romanovsky <leon@kernel.org>
To: Doug Ledford <dledford@redhat.com>,
	Jason Gunthorpe <jgg@mellanox.com>,
	"David S . Miller" <davem@davemloft.net>,
	Santosh Shilimkar <santosh.shilimkar@oracle.com>
Cc: Leon Romanovsky <leonro@mellanox.com>,
	RDMA mailing list <linux-rdma@vger.kernel.org>,
	Hans Westgaard Ry <hans.westgaard.ry@oracle.com>,
	Moni Shoua <monis@mellanox.com>,
	linux-netdev <netdev@vger.kernel.org>
Subject: [PATCH mlx5-next 08/10] net/rds: Detect need of On-Demand-Paging memory registration
Date: Wed, 15 Jan 2020 14:43:38 +0200
Message-ID: <20200115124340.79108-9-leon@kernel.org> (raw)
In-Reply-To: <20200115124340.79108-1-leon@kernel.org>

From: Hans Westgaard Ry <hans.westgaard.ry@oracle.com>

Add code to check if memory intended for RDMA is FS-DAX-memory. RDS
will fail with error code EOPNOTSUPP if FS-DAX-memory is detected.

Signed-off-by: Hans Westgaard Ry <hans.westgaard.ry@oracle.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
---
 net/rds/rdma.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/net/rds/rdma.c b/net/rds/rdma.c
index 916f5ec373d8..eb23c38ce2b3 100644
--- a/net/rds/rdma.c
+++ b/net/rds/rdma.c
@@ -156,11 +156,13 @@ void rds_rdma_drop_keys(struct rds_sock *rs)
 static int rds_pin_pages(unsigned long user_addr, unsigned int nr_pages,
 			struct page **pages, int write)
 {
+	unsigned int gup_flags = FOLL_LONGTERM;
 	int ret;

-	ret = get_user_pages_fast(user_addr, nr_pages, write ? FOLL_WRITE : 0,
-				  pages);
+	if (write)
+		gup_flags |= FOLL_WRITE;

+	ret = get_user_pages_fast(user_addr, nr_pages, gup_flags, pages);
 	if (ret >= 0 && ret < nr_pages) {
 		while (ret--)
 			put_page(pages[ret]);
--
2.20.1


  parent reply index

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-15 12:43 [PATCH mlx5-next 00/10] Use ODP MRs for kernel ULPs Leon Romanovsky
2020-01-15 12:43 ` [PATCH mlx5-next 01/10] IB: Allow calls to ib_umem_get from " Leon Romanovsky
2020-01-15 12:43 ` [PATCH mlx5-next 02/10] IB/core: Introduce ib_reg_user_mr Leon Romanovsky
2020-01-15 12:43 ` [PATCH mlx5-next 03/10] IB/core: Add interface to advise_mr for kernel users Leon Romanovsky
2020-01-15 12:43 ` [PATCH mlx5-next 04/10] IB/mlx5: Add ODP WQE handlers for kernel QPs Leon Romanovsky
2020-01-15 12:43 ` [PATCH mlx5-next 05/10] RDMA/mlx5: Don't fake udata for kernel path Leon Romanovsky
2020-01-15 12:43 ` [PATCH mlx5-next 06/10] IB/mlx5: Mask out unsupported ODP capabilities for kernel QPs Leon Romanovsky
2020-01-15 12:43 ` [PATCH mlx5-next 07/10] RDMA/mlx5: Fix handling of IOVA != user_va in ODP paths Leon Romanovsky
2020-01-15 12:43 ` Leon Romanovsky [this message]
2020-01-15 21:42   ` [PATCH mlx5-next 08/10] net/rds: Detect need of On-Demand-Paging memory registration santosh.shilimkar
2020-01-15 12:43 ` [PATCH mlx5-next 09/10] net/rds: Handle ODP mr registration/unregistration Leon Romanovsky
2020-01-15 21:51   ` santosh.shilimkar
2020-01-16  7:11     ` Leon Romanovsky
2020-01-16  7:22       ` santosh.shilimkar
2020-01-18 10:19   ` Leon Romanovsky
2020-01-15 12:43 ` [PATCH mlx5-next 10/10] net/rds: Use prefetch for On-Demand-Paging MR Leon Romanovsky
2020-01-15 21:43   ` santosh.shilimkar
2020-01-16  6:59 ` [PATCH mlx5-next 00/10] Use ODP MRs for kernel ULPs Leon Romanovsky
2020-01-16 13:57   ` Jason Gunthorpe
2020-01-16 14:04     ` Leon Romanovsky
2020-01-16 19:34     ` santosh.shilimkar
2020-01-17 14:12       ` Jason Gunthorpe

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