linux-kernel - Re: [PATCH net-next 0/6] net/mlx5e: Speedup channel configuration operations

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Message-ID: <874iqzldvq.fsf@toke.dk>
Date: Wed, 12 Nov 2025 11:54:49 +0100
From: Toke Høiland-Jørgensen <toke@...hat.com>
To: Tariq Toukan <tariqt@...dia.com>, Eric Dumazet <edumazet@...gle.com>,
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, Andrew
 Lunn <andrew+netdev@...n.ch>, "David S. Miller" <davem@...emloft.net>
Cc: Saeed Mahameed <saeedm@...dia.com>, Leon Romanovsky <leon@...nel.org>,
 Tariq Toukan <tariqt@...dia.com>, Mark Bloch <mbloch@...dia.com>, Alexei
 Starovoitov <ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>,
 Jesper Dangaard Brouer <hawk@...nel.org>, John Fastabend
 <john.fastabend@...il.com>, netdev@...r.kernel.org,
 linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org,
 bpf@...r.kernel.org, Gal Pressman <gal@...dia.com>, Leon Romanovsky
 <leonro@...dia.com>, Moshe Shemesh <moshe@...dia.com>, William Tu
 <witu@...dia.com>, Dragos Tatulea <dtatulea@...dia.com>, Nimrod Oren
 <noren@...dia.com>, Alex Lazar <alazar@...dia.com>
Subject: Re: [PATCH net-next 0/6] net/mlx5e: Speedup channel configuration
 operations

Tariq Toukan <tariqt@...dia.com> writes:

> Hi,
>
> This series significantly improves the latency of channel configuration
> operations, like interface up (create channels), interface down (destroy
> channels), and channels reconfiguration (create new set, destroy old
> one).

On the topic of improving ifup/ifdown times, I noticed at some point
that mlx5 will call synchronize_net() once for every queue when they are
deactivated (in mlx5e_deactivate_txqsq()). Have you considered changing
that to amortise the sync latency over the full interface bringdown? :)

-Toke