netdev - Re: [PATCH net-next v2 1/2] mlx5/core: relax memory barrier in eq_update

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Message-ID: <20241111183814.264205a9@kernel.org>
Date: Mon, 11 Nov 2024 18:38:14 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: Caleb Sander Mateos <csander@...estorage.com>
Cc: Saeed Mahameed <saeedm@...dia.com>, Leon Romanovsky <leon@...nel.org>,
 Tariq Toukan <tariqt@...dia.com>, Andrew Lunn <andrew+netdev@...n.ch>,
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet
 <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>, Parav Pandit
 <parav@...dia.com>, netdev@...r.kernel.org, linux-rdma@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next v2 1/2] mlx5/core: relax memory barrier in
 eq_update_ci()

On Thu,  7 Nov 2024 11:30:51 -0700 Caleb Sander Mateos wrote:
> The memory barrier in eq_update_ci() after the doorbell write is a
> significant hot spot in mlx5_eq_comp_int(). Under heavy TCP load, we see
> 3% of CPU time spent on the mfence instruction.

Applied, thanks. 

In the future please avoid sending patches in reply to older version.