netdev - Re: [PATCH net v3] net: stmmac: protect updates of 64-bit statistics counters

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Date: Wed, 07 Feb 2024 09:10:25 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Petr Tesarik <petr@...arici.cz>
Cc: alexandre.torgue@...s.st.com, joabreu@...opsys.com, davem@...emloft.net,
 edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
 mcoquelin.stm32@...il.com, wens@...e.org, jernej.skrabec@...il.com,
 samuel@...lland.org, jszhang@...nel.org, netdev@...r.kernel.org,
 linux-stm32@...md-mailman.stormreply.com,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
 linux-sunxi@...ts.linux.dev, mh+netdev@...schlus.de, andrew@...n.ch,
 f.fainelli@...il.com, stable@...r.kernel.org
Subject: Re: [PATCH net v3] net: stmmac: protect updates of 64-bit statistics
 counters

Hello:

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

On Sat,  3 Feb 2024 20:09:27 +0100 you wrote:
> As explained by a comment in <linux/u64_stats_sync.h>, write side of struct
> u64_stats_sync must ensure mutual exclusion, or one seqcount update could
> be lost on 32-bit platforms, thus blocking readers forever. Such lockups
> have been observed in real world after stmmac_xmit() on one CPU raced with
> stmmac_napi_poll_tx() on another CPU.
> 
> To fix the issue without introducing a new lock, split the statics into
> three parts:
> 
> [...]

Here is the summary with links:
  - [net,v3] net: stmmac: protect updates of 64-bit statistics counters
    https://git.kernel.org/netdev/net/c/38cc3c6dcc09

You are awesome, thank you!
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