netdev - Re: [PATCH v6] netns: optimize netns cleaning by batching unhash

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Message-Id: 
 <177043802282.1183264.13017146634925007603.git-patchwork-notify@kernel.org>
Date: Sat, 07 Feb 2026 04:20:22 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Qiliang Yuan <realwujing@...il.com>
Cc: davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
 pabeni@...hat.com, brauner@...nel.org, kuniyu@...gle.com, jack@...e.cz,
 jlayton@...nel.org, yuanql9@...natelecom.cn, horms@...nel.org,
 netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6] netns: optimize netns cleaning by batching unhash_nsid
 calls

Hello:

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

On Wed,  4 Feb 2026 02:48:42 -0500 you wrote:
> Currently, unhash_nsid() scans the entire system for each netns being
> killed, leading to O(M_dying_net * N_alive_net * N_id) complexity, as
> __peernet2id() also performs a linear search in the IDR.
> 
> Optimize this to O(N_alive_net * N_id) by batching unhash operations. Move
> unhash_nsid() out of the per-netns loop in cleanup_net() to perform a
> single-pass traversal over survivor namespaces.
> 
> [...]

Here is the summary with links:
  - [v6] netns: optimize netns cleaning by batching unhash_nsid calls
    https://git.kernel.org/netdev/net-next/c/7acee67a6bce

You are awesome, thank you!
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