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From: Jason Gunthorpe <jgg@ziepe.ca>
To: Yishai Hadas <yishaih@mellanox.com>
Cc: linux-rdma@vger.kernel.org, dledford@redhat.com,
	saeedm@mellanox.com, maorg@mellanox.com, michaelgur@mellanox.com,
	netdev@vger.kernel.org
Subject: Re: [PATCH rdma-next 08/10] RDMA/uverbs: Add new relaxed ordering memory region access flag
Date: Wed, 15 Jan 2020 14:05:49 -0400
Message-ID: <20200115180549.GA8252@ziepe.ca> (raw)
In-Reply-To: <1578506740-22188-9-git-send-email-yishaih@mellanox.com>

On Wed, Jan 08, 2020 at 08:05:38PM +0200, Yishai Hadas wrote:
> From: Michael Guralnik <michaelgur@mellanox.com>
> 
> Adding new relaxed ordering access flag for memory regions.
> Using memory regions with relaxed ordeing set can enhance performance.
> 
> This access flag is handled in a best-effort manner, drivers should
> ignore if they don't support setting relaxed ordering.
> 
> Signed-off-by: Michael Guralnik <michaelgur@mellanox.com>
> Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
>  include/rdma/ib_verbs.h                 | 1 +
>  include/uapi/rdma/ib_user_ioctl_verbs.h | 1 +
>  2 files changed, 2 insertions(+)
> 
> diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
> index ffb358f..2b3c16f 100644
> +++ b/include/rdma/ib_verbs.h
> @@ -1418,6 +1418,7 @@ enum ib_access_flags {
>  	IB_ZERO_BASED = IB_UVERBS_ACCESS_ZERO_BASED,
>  	IB_ACCESS_ON_DEMAND = IB_UVERBS_ACCESS_ON_DEMAND,
>  	IB_ACCESS_HUGETLB = IB_UVERBS_ACCESS_HUGETLB,
> +	IB_ACCESS_RELAXED_ORDERING = IB_UVERBS_ACCESS_RELAXED_ORDERING,
>  
>  	IB_ACCESS_OPTIONAL = IB_UVERBS_ACCESS_OPTIONAL_RANGE,
>  	IB_ACCESS_SUPPORTED =
> diff --git a/include/uapi/rdma/ib_user_ioctl_verbs.h b/include/uapi/rdma/ib_user_ioctl_verbs.h
> index 76dbbd9..2a165f4 100644
> +++ b/include/uapi/rdma/ib_user_ioctl_verbs.h
> @@ -54,6 +54,7 @@ enum ib_uverbs_access_flags {
>  	IB_UVERBS_ACCESS_ON_DEMAND = 1 << 6,
>  	IB_UVERBS_ACCESS_HUGETLB = 1 << 7,
>  
> +	IB_UVERBS_ACCESS_RELAXED_ORDERING = IB_UVERBS_ACCESS_OPTIONAL_FIRST,
>  	IB_UVERBS_ACCESS_OPTIONAL_RANGE =
>  		((IB_UVERBS_ACCESS_OPTIONAL_LAST << 1) - 1) &
>  		~(IB_UVERBS_ACCESS_OPTIONAL_FIRST - 1)

I would like to see a followup patch to add the DMA_ATTR_WEAK_ORDERING
setting to ib_umem_get when RELAXED_ORDERING is set.

Jason

  parent reply index

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-08 18:05 [PATCH rdma-next 00/10] Relaxed ordering memory regions Yishai Hadas
2020-01-08 18:05 ` [PATCH rdma-next 01/10] net/mlx5: Expose relaxed ordering bits Yishai Hadas
2020-01-08 18:05 ` [PATCH rdma-next 02/10] RDMA/core: Add UVERBS_METHOD_ASYNC_EVENT_ALLOC Yishai Hadas
2020-01-08 18:05 ` [PATCH rdma-next 03/10] RDMA/core: Remove ucontext_lock from the uverbs_destry_ufile_hw() path Yishai Hadas
2020-01-08 18:05 ` [PATCH rdma-next 04/10] RDMA/uverbs: Add ioctl command to get a device context Yishai Hadas
2020-01-08 18:05 ` [PATCH rdma-next 05/10] RDMA/uverbs: Verify MR access flags Yishai Hadas
2020-01-08 18:05 ` [PATCH rdma-next 06/10] RDMA/core: Add optional access flags range Yishai Hadas
2020-01-08 18:05 ` [PATCH rdma-next 07/10] RDMA/efa: Allow passing of optional access flags for MR registration Yishai Hadas
2020-01-21 16:37   ` Gal Pressman
2020-01-21 16:57     ` Yishai Hadas
2020-01-22  7:51       ` Gal Pressman
2020-01-08 18:05 ` [PATCH rdma-next 08/10] RDMA/uverbs: Add new relaxed ordering memory region access flag Yishai Hadas
2020-01-09  9:38   ` Sergei Shtylyov
2020-01-15 18:05   ` Jason Gunthorpe [this message]
2020-01-08 18:05 ` [PATCH rdma-next 09/10] RDMA/core: Add the core support field to METHOD_GET_CONTEXT Yishai Hadas
2020-01-08 18:05 ` [PATCH rdma-next 10/10] RDMA/mlx5: Set relaxed ordering when requested Yishai Hadas
2020-01-15 18:08 ` [PATCH rdma-next 00/10] Relaxed ordering memory regions Jason Gunthorpe
2020-01-16  9:20   ` Leon Romanovsky
2020-01-16 20:11     ` Jason Gunthorpe

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