netdev - Re: [patch V3 0/4] net, refcount: Address dst_entry reference count scalability issues

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Date:   Wed, 29 Mar 2023 02:30:19 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     linux-kernel@...r.kernel.org, torvalds@...uxfoundation.org,
        x86@...nel.org, wangyang.guo@...el.com, arjan@...ux.intel.com,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, netdev@...r.kernel.org, will@...nel.org,
        peterz@...radead.org, boqun.feng@...il.com, mark.rutland@....com,
        maz@...nel.org, qiuxu.zhuo@...el.com
Subject: Re: [patch V3 0/4] net, refcount: Address dst_entry reference count
 scalability issues

Hello:

This series was applied to netdev/net-next.git (main)
by Jakub Kicinski <kuba@...nel.org>:

On Thu, 23 Mar 2023 21:55:27 +0100 (CET) you wrote:
> Hi!
> 
> This is version 3 of this series. Version 2 can be found here:
> 
>      https://lore.kernel.org/lkml/20230307125358.772287565@linutronix.de
> 
> Wangyang and Arjan reported a bottleneck in the networking code related to
> struct dst_entry::__refcnt. Performance tanks massively when concurrency on
> a dst_entry increases.
> 
> [...]

Here is the summary with links:
  - [V3,1/4,V2,1/4] net: dst: Prevent false sharing vs. dst_entry:: __refcnt
    https://git.kernel.org/netdev/net-next/c/d288a162dd1c
  - [V3,2/4] atomics: Provide atomic_add_negative() variants
    https://git.kernel.org/netdev/net-next/c/e5ab9eff46b0
  - [V3,3/4] atomics: Provide rcuref - scalable reference counting
    https://git.kernel.org/netdev/net-next/c/ee1ee6db0779
  - [V3,4/4] net: dst: Switch to rcuref_t reference counting
    https://git.kernel.org/netdev/net-next/c/bc9d3a9f2afc

You are awesome, thank you!
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