From: patchwork-bot+netdevbpf@kernel.org
To: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
peterz@infradead.org, tglx@linutronix.de, kuba@kernel.org,
davem@davemloft.net
Subject: Re: [PATCH net-next] u64_stats: Disable preemption on 32bit UP+SMP PREEMPT_RT during updates.
Date: Mon, 13 Dec 2021 12:50:09 +0000 [thread overview]
Message-ID: <163939980990.30215.13552444074431867461.git-patchwork-notify@kernel.org> (raw)
In-Reply-To: <YbO4x7vRoDGUWxrv@linutronix.de>
Hello:
This patch was applied to netdev/net-next.git (master)
by David S. Miller <davem@davemloft.net>:
On Fri, 10 Dec 2021 21:29:59 +0100 you wrote:
> On PREEMPT_RT the seqcount_t for synchronisation is required on 32bit
> architectures even on UP because the softirq (and the threaded IRQ handler) can
> be preempted.
>
> With the seqcount_t for synchronisation, a reader with higher priority can
> preempt the writer and then spin endlessly in read_seqcount_begin() while the
> writer can't make progress.
>
> [...]
Here is the summary with links:
- [net-next] u64_stats: Disable preemption on 32bit UP+SMP PREEMPT_RT during updates.
https://git.kernel.org/netdev/net-next/c/3c118547f87e
You are awesome, thank you!
--
Deet-doot-dot, I am a bot.
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prev parent reply other threads:[~2021-12-13 12:50 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-10 20:29 Sebastian Andrzej Siewior
2021-12-13 12:50 ` patchwork-bot+netdevbpf [this message]
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