From: Jason Gunthorpe <jgg@ziepe.ca>
To: Leon Romanovsky <leon@kernel.org>
Cc: Jianxin Xiong <jianxin.xiong@intel.com>,
linux-rdma@vger.kernel.org, Doug Ledford <dledford@redhat.com>,
Sumit Semwal <sumit.semwal@linaro.org>
Subject: Re: [RFC PATCH 1/3] RDMA/umem: Support importing dma-buf as user memory region
Date: Thu, 16 Apr 2020 15:04:07 -0300 [thread overview]
Message-ID: <20200416180407.GV5100@ziepe.ca> (raw)
In-Reply-To: <20200416180201.GH1309273@unreal>
On Thu, Apr 16, 2020 at 09:02:01PM +0300, Leon Romanovsky wrote:
> > diff --git a/drivers/infiniband/Kconfig b/drivers/infiniband/Kconfig
> > index ade8638..1dcfc59 100644
> > +++ b/drivers/infiniband/Kconfig
> > @@ -63,6 +63,16 @@ config INFINIBAND_ON_DEMAND_PAGING
> > memory regions without pinning their pages, fetching the
> > pages on demand instead.
> >
> > +config INFINIBAND_DMABUF
>
> There is no need to add extra config, it is not different from any
> other verbs feature which is handled by some sort of mask.
That works too, but then it infiniband_user_mem needs the
depends on DMABUF || !DMABUF construct
> > + if (access & IB_ACCESS_ON_DEMAND)
> > + return ERR_PTR(-EOPNOTSUPP);
>
> Does dma-buf really need to prohibit ODP?
ODP fundamentally can only be applied to a mm_struct
Jason
next prev parent reply other threads:[~2020-04-16 18:04 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-16 17:09 [RFC PATCH 0/3] RDMA: Add dma-buf support Jianxin Xiong
2020-04-16 17:09 ` [RFC PATCH 1/3] RDMA/umem: Support importing dma-buf as user memory region Jianxin Xiong
2020-04-16 18:01 ` Jason Gunthorpe
2020-04-16 19:41 ` Xiong, Jianxin
2020-04-17 12:31 ` Jason Gunthorpe
2020-04-17 15:49 ` Xiong, Jianxin
2020-04-16 18:02 ` Leon Romanovsky
2020-04-16 18:04 ` Jason Gunthorpe [this message]
2020-04-16 18:30 ` Leon Romanovsky
2020-04-16 21:08 ` Xiong, Jianxin
2020-04-16 17:09 ` [RFC PATCH 2/3] RDMA/uverbs: Add uverbs commands for fd-based MR registration Jianxin Xiong
2020-04-16 17:47 ` Jason Gunthorpe
2020-04-16 18:32 ` Xiong, Jianxin
2020-04-17 12:35 ` Jason Gunthorpe
2020-04-16 17:09 ` [RFC PATCH 3/3] RDMA/mlx5: Support new uverbs commands for registering fd-based MR Jianxin Xiong
2020-04-16 17:54 ` [RFC PATCH 0/3] RDMA: Add dma-buf support Jason Gunthorpe
2020-04-16 19:08 ` Xiong, Jianxin
2020-04-16 19:34 ` Jason Gunthorpe
2020-04-16 21:02 ` Xiong, Jianxin
2020-04-17 12:35 ` Jason Gunthorpe
2020-04-17 16:49 ` Xiong, Jianxin
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