linux-kernel - Re: [PATCH v8 RESEND 0/6] r8169: Enable ASPM for recent 1.0/2.5Gbps Realtek NICs

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <c21a3f74-871c-8726-f078-b4c2c3414ebd@gmail.com>
Date:   Tue, 21 Feb 2023 11:48:47 +0100
From:   Heiner Kallweit <hkallweit1@...il.com>
To:     Kai-Heng Feng <kai.heng.feng@...onical.com>, nic_swsd@...ltek.com,
        bhelgaas@...gle.com
Cc:     koba.ko@...onical.com, acelan.kao@...onical.com,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, sathyanarayanan.kuppuswamy@...ux.intel.com,
        vidyas@...dia.com, rafael.j.wysocki@...el.com,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-pci@...r.kernel.org
Subject: Re: [PATCH v8 RESEND 0/6] r8169: Enable ASPM for recent 1.0/2.5Gbps
 Realtek NICs

On 21.02.2023 03:38, Kai-Heng Feng wrote:
> The series is to enable ASPM on more r8169 supported devices, if
> available.
> 
> The latest Realtek vendor driver and its Windows driver implements a
> feature called "dynamic ASPM" which can improve performance on it's
> ethernet NICs.
> 
> We have "dynamic ASPM" mechanism in Ubuntu 22.04 LTS kernel for quite a
> while, and AFAIK it hasn't introduced any regression so far. 
> 
> A very similar issue was observed on Realtek wireless NIC, and it was
> resolved by disabling ASPM during NAPI poll. So in v8, we use the same
> approach, which is more straightforward, instead of toggling ASPM based
> on packet count.
> 
> v7:
> https://lore.kernel.org/netdev/20211016075442.650311-1-kai.heng.feng@canonical.com/
> 
> v6:
> https://lore.kernel.org/netdev/20211007161552.272771-1-kai.heng.feng@canonical.com/
> 
> v5:
> https://lore.kernel.org/netdev/20210916154417.664323-1-kai.heng.feng@canonical.com/
> 
> v4:
> https://lore.kernel.org/netdev/20210827171452.217123-1-kai.heng.feng@canonical.com/
> 
> v3:
> https://lore.kernel.org/netdev/20210819054542.608745-1-kai.heng.feng@canonical.com/
> 
> v2:
> https://lore.kernel.org/netdev/20210812155341.817031-1-kai.heng.feng@canonical.com/
> 
> v1:
> https://lore.kernel.org/netdev/20210803152823.515849-1-kai.heng.feng@canonical.com/
> 
> Kai-Heng Feng (6):
>   r8169: Disable ASPM L1.1 on 8168h
>   Revert "PCI/ASPM: Unexport pcie_aspm_support_enabled()"
>   PCI/ASPM: Add pcie_aspm_capable() helper
>   r8169: Consider chip-specific ASPM can be enabled on more cases
>   r8169: Use mutex to guard config register locking
>   r8169: Disable ASPM while doing NAPI poll
> 
>  drivers/net/ethernet/realtek/r8169_main.c | 48 ++++++++++++++++++-----
>  drivers/pci/pcie/aspm.c                   | 12 ++++++
>  include/linux/pci.h                       |  2 +
>  3 files changed, 53 insertions(+), 9 deletions(-)
> 

Note that net-next is closed during merge window.
Formal aspect: Your patches miss the net/net-next annotation.
The title of the series may be an old one. Actually most ASPM
states are enabled, you add to disable ASPM temporarily.