netdev - Re: [PATCH v4] tcp: Add memory barrier to tcp

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 for Android: free password hash cracker in your pocket

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

Message-Id: 
 <170600342579.26307.3816738058418886684.git-patchwork-notify@kernel.org>
Date: Tue, 23 Jan 2024 09:50:25 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Salvatore Dipietro <dipiets@...zon.com>
Cc: edumazet@...gle.com, davem@...emloft.net, dsahern@...nel.org,
 kuba@...nel.org, pabeni@...hat.com, netdev@...r.kernel.org,
 blakgeof@...zon.com, alisaidi@...zon.com, benh@...zon.com,
 dipietro.salvatore@...il.com
Subject: Re: [PATCH v4] tcp: Add memory barrier to tcp_push()

Hello:

This patch was applied to netdev/net.git (main)
by Paolo Abeni <pabeni@...hat.com>:

On Fri, 19 Jan 2024 11:01:33 -0800 you wrote:
> On CPUs with weak memory models, reads and updates performed by tcp_push
> to the sk variables can get reordered leaving the socket throttled when
> it should not. The tasklet running tcp_wfree() may also not observe the
> memory updates in time and will skip flushing any packets throttled by
> tcp_push(), delaying the sending. This can pathologically cause 40ms
> extra latency due to bad interactions with delayed acks.
> 
> [...]

Here is the summary with links:
  - [v4] tcp: Add memory barrier to tcp_push()
    https://git.kernel.org/netdev/net/c/7267e8dcad6b

You are awesome, thank you!
-- 
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html