From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.ptr1337.dev (mail.ptr1337.dev [202.61.224.105]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C4DF1239085; Tue, 14 Apr 2026 18:19:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=202.61.224.105 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776190797; cv=none; b=GOaAHQ8AXFBcBnrlDSg3EtXrb5J0vyvy7PsiykqP77doqgNBf/no4GaQdcpL99b1HDMX5uiUIZucwZokXm0kf7DcIqqvEnPTPsrJziVNozsyoQXm/U4BCkOABYMJmUZkxGio5f5g9kQf1JKsKfhs7FOZ8S6qDJ+LW73zImKeuYM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776190797; c=relaxed/simple; bh=7NLIVLEo1oZ9lp8JK2MqQPj3X/eSvySWABd833ymfEY=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=SBG0hV+HH2uL449R4nbfhm8CZUBnwo8XxX27laXMlQOw7qWw2s83QYq+0m6Nu7kFVKIK81pODQi0fHDJ0ixinHJA1OROp9n3dcnvNIe0rpIk4/YDnfVdC00P/XYNUWIBLal4KocjNVzvLxmC9JG5C8NVNu/uK0UJ87/2+96R6oQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=cachyos.org; spf=pass smtp.mailfrom=cachyos.org; dkim=pass (2048-bit key) header.d=cachyos.org header.i=@cachyos.org header.b=OxN7zcLq; arc=none smtp.client-ip=202.61.224.105 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=cachyos.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=cachyos.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=cachyos.org header.i=@cachyos.org header.b="OxN7zcLq" Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 4300D285DF2; Tue, 14 Apr 2026 20:19:39 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cachyos.org; s=dkim; t=1776190787; h=from:subject:date:message-id:to:cc:mime-version:content-type: content-transfer-encoding:in-reply-to:references; bh=QhA6fInA9ev/sumb0+jecuGAIgHW/ts30uXmTk7kTpU=; b=OxN7zcLqTH8SXiH6uWGZDIq0dKmbqVcDaJl9R/REPhY09HJCaxP1yGVKfmHVlwon7nGTnz WVskt5RD60gh5TrFWYeXi1N0UJrNp3OLq9eqklJuIa7Mr8r2SWl/vUNxk7CeVYQd9uz4f3 v0Lb/ZrUJuMbsYfRJ9J9pSn9d8cmz7F52sQdb2OYjCFN6fPXcyPCklnIL+JLdgVRnG6m47 Xz0zhnqWwHbthKjgOH1e06PbSf9MFkMLSwo7mD/33PKsXRCz74beFpwoT8TwYkVs00S97i jC7V+42+8JmZx+KaK9Z0EjVxBy7U71KXTnEiuMFMEcjRSqLwYQK+H1HV+rAyxQ== Message-ID: <3a35daf9-edc5-4b41-b784-7b667d2738ba@cachyos.org> Date: Tue, 14 Apr 2026 18:19:00 +0000 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Subject: Re: The "clockevents: Prevent timer interrupt starvation" patch causes lockups To: Calvin Owens Cc: Hanabishi , Thomas Gleixner , LKML , Peter Zijlstra , Anna-Maria Behnsen , Frederic Weisbecker , Ingo Molnar , John Stultz , Stephen Boyd , Alexander Viro , Christian Brauner , Jan Kara , linux-fsdevel@vger.kernel.org, Sebastian Reichel , linux-pm@vger.kernel.org, Pablo Neira Ayuso , Florian Westphal , Phil Sutter , netfilter-devel@vger.kernel.org, coreteam@netfilter.org References: <20260407083219.478203185@kernel.org> <20260407083247.562657657@kernel.org> <68d1e9ac-2780-4be3-8ee3-0788062dd3a4@gmail.com> From: Eric Naim In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Last-TLS-Session-Version: TLSv1.3 On 4/15/26 1:25 AM, Calvin Owens wrote: > On Tuesday 04/14 at 15:39 +0000, Eric Naim wrote: >> On 4/14/26 5:20 AM, Hanabishi wrote: >>> >>> Hello. >>> >>> Sorry, but this patch as of 7.0 introduced *severe* periodic lockups on my >>> Ryzen 7700X machine. >>> I see such messages in the log: >>> >>> clocksource: Long readout interval, skipping watchdog check: cs_nsec: >>> 2897344852 wd_nsec: 2897356996 >>> >>> Reverting d6e152d905bdb1f32f9d99775e2f453350399a6a for mainline fixes the >>> issue for me. >>> >> >> Hi maintainers, >> >> several users from CachyOS has reported this regression as well. We landed on >> the same bisection. One of the users that could reproduce this reliably >> reproduced this just by watching a YouTube video in a browser, and observed >> freezes and stutters when interacting with the system. > > Huh, I can't reproduce this at all across 10+ machines. Can you share > the Kconfig you're seeing this on? Right, here it is [1]. CachyOS does carry a lot of downstream patches, but I made sure to reproduce this on mainline before reporting here. [1] https://github.com/CachyOS/linux-cachyos/blob/4224303b6d7a50dd1cc3ffa78864050cc9536eec/linux-cachyos/config > > Thanks, > Calvin -- Regards, Eric