From: Leon Romanovsky <leon@kernel.org>
To: Jason Gunthorpe <jgg@nvidia.com>
Cc: linux-rdma@vger.kernel.org, Pavel Shamis <Pavel.Shamis@arm.com>
Subject: Re: [PATCH] IB/mlx5: Call io_stop_wc() after writing to WC MMIO
Date: Tue, 16 Aug 2022 15:11:40 +0300 [thread overview]
Message-ID: <YvuJfLpcKCvhRw3S@unreal> (raw)
In-Reply-To: <0-v1-c5dade92f363+11-mlx5_io_stop_wc_jgg@nvidia.com>
On Fri, Jul 29, 2022 at 01:33:38PM -0300, Jason Gunthorpe wrote:
> This new function is defined only on ARM and serves to guarantee a barrier
> in the WC operation. The barrier means that another run of this loop will
> not combine with the stores this loop created.
>
> On x86 this is happening implicitly because of the spin_unlock().
>
> Suggested-by: "Pavel Shamis" <Pavel.Shamis@arm.com>
> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
> ---
> drivers/infiniband/hw/mlx5/mem.c | 1 +
> 1 file changed, 1 insertion(+)
>
Thanks, applied.
prev parent reply other threads:[~2022-08-16 12:16 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-29 16:33 [PATCH] IB/mlx5: Call io_stop_wc() after writing to WC MMIO Jason Gunthorpe
2022-08-16 12:11 ` Leon Romanovsky [this message]
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