From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3A69AC433EF for ; Mon, 13 Dec 2021 12:50:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236998AbhLMMuP (ORCPT ); Mon, 13 Dec 2021 07:50:15 -0500 Received: from sin.source.kernel.org ([145.40.73.55]:53246 "EHLO sin.source.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231509AbhLMMuN (ORCPT ); Mon, 13 Dec 2021 07:50:13 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sin.source.kernel.org (Postfix) with ESMTPS id D4779CE0FB5; Mon, 13 Dec 2021 12:50:11 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPS id 054D2C34603; Mon, 13 Dec 2021 12:50:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1639399810; bh=DQf3QvLEOaqcdHPAVObxLCxmaxqzlmQ7qY/VJyHZMlM=; h=Subject:From:Date:References:In-Reply-To:To:Cc:From; b=Hjg3NP9ScoDtrk0G0F0T4lnCCvGTEy9unNAcRRBoEmHzzxDOI2O//0+n9X8oIN1W0 2DrU3uLqvVNXv3zOxmcptYq3GGbzV/Xb+MCsdwempGzF5s8uB2a/gbVOJ+dUcv8Npi hbWiZdvz92Bkgx+oHADuN40wyMfgsdxndPN9qDLYz1QSs8blRRiTIJKs3WR0Ar7Itr k3yPtdevCI4dq61hTbjX7K3wtofAmiMCU/qhcUWoWeAaPAWyig69K+1RxY2KOO3A7S sWD+0PFUPqzwOcpxx2f2GnwAKJIM8E+l6S8nsoMSg9xo/thFrcrtchNR9iJoGE4Hd0 6dOjXk8mc3hrQ== Received: from pdx-korg-docbuild-2.ci.codeaurora.org (localhost.localdomain [127.0.0.1]) by pdx-korg-docbuild-2.ci.codeaurora.org (Postfix) with ESMTP id DDE40609D6; Mon, 13 Dec 2021 12:50:09 +0000 (UTC) Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: Re: [PATCH net-next] u64_stats: Disable preemption on 32bit UP+SMP PREEMPT_RT during updates. From: patchwork-bot+netdevbpf@kernel.org Message-Id: <163939980990.30215.13552444074431867461.git-patchwork-notify@kernel.org> Date: Mon, 13 Dec 2021 12:50:09 +0000 References: In-Reply-To: To: Sebastian Andrzej Siewior Cc: linux-kernel@vger.kernel.org, netdev@vger.kernel.org, peterz@infradead.org, tglx@linutronix.de, kuba@kernel.org, davem@davemloft.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello: This patch was applied to netdev/net-next.git (master) by David S. Miller : 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. https://korg.docs.kernel.org/patchwork/pwbot.html