netdev - Re: [PATCH net-next] net-sysfs: try not to restart the syscall if it will fail eventually

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Message-Id: <163370340821.9336.11969277633454623458.git-patchwork-notify@kernel.org>
Date:   Fri, 08 Oct 2021 14:30:08 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Antoine Tenart <atenart@...nel.org>
Cc:     davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com,
        juri.lelli@...hat.com, mhocko@...e.com, netdev@...r.kernel.org
Subject: Re: [PATCH net-next] net-sysfs: try not to restart the syscall if it will
 fail eventually

Hello:

This patch was applied to netdev/net-next.git (master)
by David S. Miller <davem@...emloft.net>:

On Thu,  7 Oct 2021 16:00:51 +0200 you wrote:
> Due to deadlocks in the networking subsystem spotted 12 years ago[1],
> a workaround was put in place[2] to avoid taking the rtnl lock when it
> was not available and restarting the syscall (back to VFS, letting
> userspace spin). The following construction is found a lot in the net
> sysfs and sysctl code:
> 
>   if (!rtnl_trylock())
>           return restart_syscall();
> 
> [...]

Here is the summary with links:
  - [net-next] net-sysfs: try not to restart the syscall if it will fail eventually
    https://git.kernel.org/netdev/net-next/c/146e5e733310

You are awesome, thank you!
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