From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (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 2ADF22F83BC for ; Thu, 18 Sep 2025 08:07:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.155.92.199 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758182827; cv=none; b=Qt85d7Li41Kq1wzKg0onhOtpImI8xKTFvi6D/Dm2dS5rLxB9KzwWt6LRkzE91mYSJOs2w8t2z19ASczF3qTaUIPhIOwKo9rv5Y0WfSmz4SWCmUzlETCXwc9G7ypgiMkPVhvYlqmqFPqdsL0p0Lao7OTzDKGhOekWY0DPbid4Smg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758182827; c=relaxed/simple; bh=QSNJ+3ImKc9bXFJdImgvqGXc8uHIseP7vI4/WK90R2k=; h=Message-ID:Date:From:To:Cc:Subject; b=kHH6JJLUR22BAqKh6mthfeH/p8u3AIuRajQv/0ezFxUaUBSEkSU9BcgA3yhUkhLX6leUAYzdUQ/bcPkUywkZqOjJDAhK444Q+IkADMKqoLUupLm3TY7RdsVdG4ahLG8x4DR9eci5Jaof6q040EglNv8yBy88hoqk+B0vWezWtuw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=ABqAVqek; arc=none smtp.client-ip=90.155.92.199 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="ABqAVqek" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Subject:Cc:To:From:Date:Message-ID: Sender:Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To:References; bh=itnEEd5R+e/p2i5IgI4P9XDj1NQGejk7Uo8rKiES1mY=; b=ABqAVqekY03wp92G6gQbvQnkvG M5VeBGgbrvcLC2bmNlNlCb/15Aa9fLXTOu8IVGnNbd9xrA96CBj7qNk47FUbhl6wUGszBYAqJZpJ6 hL7FZFILdPqfNyph+4CakYXlmqUEPbuN/j34SsjYYT4tSzswYHjPYDenh99kftq2FXCiBmHlT/Ryz sHZ4YRdKHjZZgSrhvTm469tceurrjgvOQqfvOtv95Wko1W1Z9Tl/UBEZ2n0Znv9DK16t/VmvUjNmf agW/yRsUz+WAtgwv4+HNs5jnEpZmuxrdw9mllV1Z/64UpCWKSdPrNyHxrA1iBeFhvjmltGldX1uIg /Zj/qU1Q==; Received: from 77-249-17-252.cable.dynamic.v4.ziggo.nl ([77.249.17.252] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.98.2 #2 (Red Hat Linux)) id 1uz9fD-00000007Z6K-0USi; Thu, 18 Sep 2025 08:06:49 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 0) id 11149300328; Thu, 18 Sep 2025 10:06:46 +0200 (CEST) Message-ID: <20250918075219.091828500@infradead.org> User-Agent: quilt/0.68 Date: Thu, 18 Sep 2025 09:52:19 +0200 From: Peter Zijlstra To: tglx@linutronix.de Cc: arnd@arndb.de, anna-maria@linutronix.de, frederic@kernel.org, peterz@infradead.org, luto@kernel.org, mingo@redhat.com, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de, vschneid@redhat.com, linux-kernel@vger.kernel.org, oliver.sang@intel.com Subject: [PATCH 0/8] hrtimer/sched: Improve hrtick Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Hi! A few patches trying to improve the sched hrtick feature, which is currently disabled due to overhead. I wrote these after the last OSPM, but I've been sitting on them because 0-day is not having a good time with the second to last patch. I've not been able to reproduce :-( Anyway, the first few patches should be 'good' and hopefully one of you will spot my 'obvious' fail in that late patch. For those of you rocking ARM64 systems, if you pick up the generic entry patches: https://lkml.kernel.org/r/20250916082611.2972008-1-ruanjinjie@huawei.com this late patch should also 'work' (or not as the case might be) for you. Patches also here: git://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git sched/hrtick