netdev - Re: [PATCH rdma-next 2/5] RDMA/mlx5: Replace cache list with Xarray

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Message-ID: <20220608150839.GW1343366@nvidia.com>
Date:   Wed, 8 Jun 2022 12:08:39 -0300
From:   Jason Gunthorpe <jgg@...dia.com>
To:     Aharon Landau <aharonl@...dia.com>
Cc:     Leon Romanovsky <leon@...nel.org>, linux-rdma@...r.kernel.org,
        netdev@...r.kernel.org, Saeed Mahameed <saeedm@...dia.com>
Subject: Re: [PATCH rdma-next 2/5] RDMA/mlx5: Replace cache list with Xarray

On Wed, Jun 08, 2022 at 04:28:19PM +0300, Aharon Landau wrote:

>    Isn't it a problem to store an mkey before ib_umem_release()?

Shouldn't, the mkey has no connection to the umem other than the umem
was used as the source of DMA addresses to put in the mkey.

Previously it was ordered the way it was because thr mr->umem pointer
would get overwritten as soon as the mr was put in the cache, but now
that the mr is just freed that isn't a problem.

Jason