linux-kernel - Re: [PATCH rdma-next v1 0/7] Use ib_umem_find_best

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Date:   Mon, 16 Nov 2020 16:56:31 -0400
From:   Jason Gunthorpe <jgg@...dia.com>
To:     Leon Romanovsky <leon@...nel.org>
CC:     Doug Ledford <dledford@...hat.com>,
        Leon Romanovsky <leonro@...dia.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eli Cohen <eli@...lanox.com>,
        Haggai Abramonvsky <hagaya@...lanox.com>,
        Jack Morgenstein <jackm@....mellanox.co.il>,
        <linux-kernel@...r.kernel.org>, <linux-rdma@...r.kernel.org>,
        "majd@...lanox.com" <majd@...lanox.com>,
        Matan Barak <matanb@...lanox.com>,
        Or Gerlitz <ogerlitz@...lanox.com>,
        Roland Dreier <roland@...estorage.com>,
        Sagi Grimberg <sagi@...mberg.me>,
        Yishai Hadas <yishaih@...lanox.com>
Subject: Re: [PATCH rdma-next v1 0/7] Use ib_umem_find_best_pgsz() for all
 umems

On Sun, Nov 15, 2020 at 01:43:04PM +0200, Leon Romanovsky wrote:
> From: Leon Romanovsky <leonro@...dia.com>
> 
> Changelog:
> v1:
>  * Added patch for raw QP
>  * Fixed commit messages
> v0: https://lore.kernel.org/lkml/20201026132635.1337663-1-leon@kernel.org
> 
> -------------------------
> >From Jason:
> 
> Move the remaining cases working with umems to use versions of
> ib_umem_find_best_pgsz() tailored to the calculations the devices
> requires.
> 
> Unlike a MR there is no IOVA, instead a page offset from the starting page
> is possible, with various restrictions.
> 
> Compute the best page size to meet the page_offset restrictions.
> 
> Thanks
> 
> Jason Gunthorpe (7):
>   RDMA/mlx5: Use ib_umem_find_best_pgoff() for SRQ
>   RDMA/mlx5: Use mlx5_umem_find_best_quantized_pgoff() for WQ
>   RDMA/mlx5: Directly compute the PAS list for raw QP RQ's
>   RDMA/mlx5: Use mlx5_umem_find_best_quantized_pgoff() for QP
>   RDMA/mlx5: mlx5_umem_find_best_quantized_pgoff() for CQ
>   RDMA/mlx5: Use ib_umem_find_best_pgsz() for devx
>   RDMA/mlx5: Lower setting the umem's PAS for SRQ

Applied to for-next

Jason