linux-kernel - Re: [PATCH net] rxrpc, afs: Fix peer hash locking vs RCU callback

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Message-Id: 
 <173801944199.3253418.8964414973990474171.git-patchwork-notify@kernel.org>
Date: Mon, 27 Jan 2025 23:10:41 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: David Howells <dhowells@...hat.com>
Cc: netdev@...r.kernel.org, marc.dionne@...istor.com, kuba@...nel.org,
 edumazet@...gle.com, pabeni@...hat.com, horms@...nel.org,
 davem@...emloft.net, linux-afs@...ts.infradead.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH net] rxrpc, afs: Fix peer hash locking vs RCU callback

Hello:

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

On Thu, 23 Jan 2025 08:59:12 +0000 you wrote:
> In its address list, afs now retains pointers to and refs on one or more
> rxrpc_peer objects.  The address list is freed under RCU and at this time,
> it puts the refs on those peers.
> 
> Now, when an rxrpc_peer object runs out of refs, it gets removed from the
> peer hash table and, for that, rxrpc has to take a spinlock.  However, it
> is now being called from afs's RCU cleanup, which takes place in BH
> context - but it is just taking an ordinary spinlock.
> 
> [...]

Here is the summary with links:
  - [net] rxrpc, afs: Fix peer hash locking vs RCU callback
    https://git.kernel.org/netdev/net/c/79d458c13056

You are awesome, thank you!
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