From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 48671313E30; Tue, 7 Apr 2026 20:58:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775595500; cv=none; b=XE9gDT6iLPYV2x4HQI/oyNcv/UsKulvOg0eFKdW4OXaitPl6TaY8cZv8Vy1/aJQJDo6qLSIwUatrAsTDV/rJneqoCU1h0HkQgLoKzheiZUnXqNvQXnmsXYN6yZwT3IJ5vOZB1Hk3CG9SgsyzOfWjlU3/c313r1s/gpbED/SPqUk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775595500; c=relaxed/simple; bh=azI9MIFpXRuzEZQXX/hxvHrFrp7m5B/1P6YlrzqI9C8=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: MIME-Version:Content-Type; b=oxFdynfL5BW1sHkoQd2VvehIQTCMh84XDbchxnDBU8yT3QX248MJ62BgqeJkKmVMwbT1OHEU9AdhxIgETBOQyGs4J3RYCj1k/nTsXWldtR6hXJzJYzKtjcUW22RfhGkiLwM0LVPZpS80Vnu0XPIfGlQUmDcVc5OnbOocnhqieMI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=L+nE9I02; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="L+nE9I02" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 49A9BC116C6; Tue, 7 Apr 2026 20:58:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775595500; bh=azI9MIFpXRuzEZQXX/hxvHrFrp7m5B/1P6YlrzqI9C8=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=L+nE9I02IxZxS4Ni9MXq6/89TVLA0jMQWLRuUe9unn2BRSZARrFeatLTGesgC0lhh FyMJhUN/9Ih6oXz6cotXiaP60n5KI+Rzfy9u7l33aqx04PY9E3mpCm3+fv8oz2x1Qm Sqixfln6WsMpm8aCtPVG8dLllQ+qHYRHdnqNInWq037b/dl2ymRLL4j8K8z6L6Feag VAvKt7nxHoocnqxTq/k2WfyprCh+TMt+G0DjeERJhF/q1FuEnP9qT4fWNIM+KCUO0V 0VgkNma4b7imM4xCsRi0Z2v1V3JyNiWidmrQ87Dth1WTKuEy/mPjRqWnkzAOwtoYfy si3zib4l86Ovg== From: Thomas Gleixner To: Calvin Owens Cc: 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 Subject: Re: [patch 00/12] hrtimers: Prevent hrtimer interrupt starvation In-Reply-To: References: <20260407083219.478203185@kernel.org> <87ika24phf.ffs@tglx> Date: Tue, 07 Apr 2026 22:58:16 +0200 Message-ID: <87fr564hef.ffs@tglx> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain On Tue, Apr 07 2026 at 11:35, Calvin Owens wrote: > On Tuesday 04/07 at 20:03 +0200, Thomas Gleixner wrote: >> On Tue, Apr 07 2026 at 10:38, Calvin Owens wrote: >> > On Tuesday 04/07 at 10:54 +0200, Thomas Gleixner wrote: >> >> He provided a reproducer, which sets up a timerfd based timer and then >> >> rearms it in a loop with an absolute expiry time of 1ns. >> > >> > The original AMD machines survive the reproducer with this series. >> > >> > Tested-by: Calvin Owens >> > >> > I'm happy to test subsets of it and stable backports too, if that's >> > helpful, just let me know. >> >> We'll only backport the first patch, so confirming that it still >> prevents the issue would be nice. The rest is slated for upstream only. > > Confirmed, [1/12] alone passes. Thanks a lot for all your help. Very appreciated. tglx