netdev - Re: [PATCH v4 4/5] r8169: Coalesce mac ocp commands for 8125 and 8125B start to reduce spinlock contention

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Date: Mon, 30 Oct 2023 14:53:59 -0700
From: Jacob Keller <jacob.e.keller@...el.com>
To: Mirsad Goran Todorovac <mirsad.todorovac@....unizg.hr>, Jason Gunthorpe
	<jgg@...pe.ca>, Joerg Roedel <jroedel@...e.de>, Lu Baolu
	<baolu.lu@...ux.intel.com>, <iommu@...ts.linux.dev>,
	<linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>
CC: Joerg Roedel <joro@...tes.org>, Will Deacon <will@...nel.org>, "Robin
 Murphy" <robin.murphy@....com>, Heiner Kallweit <hkallweit1@...il.com>,
	<nic_swsd@...ltek.com>, "David S. Miller" <davem@...emloft.net>, Eric Dumazet
	<edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni
	<pabeni@...hat.com>, Marco Elver <elver@...gle.com>
Subject: Re: [PATCH v4 4/5] r8169: Coalesce mac ocp commands for 8125 and
 8125B start to reduce spinlock contention



On 10/29/2023 4:04 AM, Mirsad Goran Todorovac wrote:
> Repeated calls to r8168_mac_ocp_write() and r8168_mac_ocp_modify() in
> the startup of 8125 and 8125B involve implicit spin_lock_irqsave() and
> spin_unlock_irqrestore() on each invocation.
> 
> Coalesced with the corresponding helpers r8168_mac_ocp_write_seq() and
> r8168_mac_ocp_modify_seq() into sequential write or modidy with a sinqle lock/unlock,
> these calls reduce overall lock contention.
> 
> Fixes: f1bce4ad2f1ce ("r8169: add support for RTL8125")
> Fixes: 0439297be9511 ("r8169: add support for RTL8125B")
> Cc: Heiner Kallweit <hkallweit1@...il.com>
> Cc: Marco Elver <elver@...gle.com>
> Cc: nic_swsd@...ltek.com
> Cc: "David S. Miller" <davem@...emloft.net>
> Cc: Eric Dumazet <edumazet@...gle.com>
> Cc: Jakub Kicinski <kuba@...nel.org>
> Cc: Paolo Abeni <pabeni@...hat.com>
> Cc: netdev@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org
> Link: https://lore.kernel.org/lkml/20231028005153.2180411-1-mirsad.todorovac@alu.unizg.hr/
> Link: https://lore.kernel.org/lkml/20231028110459.2644926-1-mirsad.todorovac@alu.unizg.hr/
> Signed-off-by: Mirsad Goran Todorovac <mirsad.todorovac@....unizg.hr>
> ---

Reviewed-by: Jacob Keller <jacob.e.keller@...el.com>