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 BBDC313B5B4 for ; Thu, 26 Sep 2024 15:26:09 +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=1727364369; cv=none; b=ZCrPRIzbGYWlCQjXGAumG2sj2VdfigQpTa9jqAYJ70ntdi+qD3TUKee/vOzXZdWmL5x1D4wfX/76dG+FYz9qASjmeyhn3v3SrWHNJNHnQEvhRD8ifIro76ABLGr5Ve30uuRSbkriRfcKo6jO5z2dIXb+QE4SKvOGTjDvq8IcuyU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727364369; c=relaxed/simple; bh=8CKMsEFdjCKMOgDz8o9NjEloxFEc0Lu3sR7G+gUxs1U=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=ZHV0Clwi+mOY3s8BWu1Kb7/ACJ/p3+WZq9RJlQijDs+Zbc20FrsHSFPFKkoC7qOLSQebIpoLk8p18PLydQ761ZiMqt93i4nBpXgWmlZIHC7/UCnw7/oiwUPbnoVEa+rQWLMRSAIEhzptmiGcDUOVJxo6O1nhZt/ff09cQ7fpYzU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=hseXYLKY; 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="hseXYLKY" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 196C4C4CEC6; Thu, 26 Sep 2024 15:26:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1727364369; bh=8CKMsEFdjCKMOgDz8o9NjEloxFEc0Lu3sR7G+gUxs1U=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=hseXYLKYZFojVQt6yvgkNk550/l7jDyAVzFhDrt1eKoYnROV9VbKxM9j2J35AtpF+ Uv8dOLDgqmGU3MH218rM+FOeK8bIuzjV2sWE94PRfSgA3zT6uDQ1C2CQJceAivSNAl EHblzh/+TeXmUH8ZAWLd23VsxALDacYOoaYfaLb9E+SbnPs2dYmpCQ6hEbpEdxVVVE twIUp3Ir7rnk8kVbsRHu6Vi3mvXTR0PdzmyTne0CEnT4yYbTSPoorAYLGynnr5Et0V JNvIAHkKoK9Y3wn9EWznfUewiXwIsKdkGmBi9kax+er7mAI6D5VBoI+Mtz6O/xu7Bi RbD8JyahzuDgQ== Date: Thu, 26 Sep 2024 17:26:07 +0200 From: Frederic Weisbecker To: Waiman Long Cc: Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Valentin Schneider , linux-kernel@vger.kernel.org, Phil Auld Subject: Re: [PATCH v4 2/4] sched/isolation: Make "isolcpus=nohz" equivalent to "nohz_full" Message-ID: References: <20240921190720.106195-1-longman@redhat.com> <20240921190720.106195-3-longman@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20240921190720.106195-3-longman@redhat.com> Le Sat, Sep 21, 2024 at 03:07:18PM -0400, Waiman Long a écrit : > The "isolcpus=nohz" boot parameter and flag were used to disable tick > when running a single task. Nowsdays, this "nohz" flag is seldomly used > as it is included as part of the "nohz_full" parameter. Extend this > flag to cover other kernel noises disabled by the "nohz_full" parameter > to make them equivalent. This also eliminates the need to use both the > "isolcpus" and the "nohz_full" parameters to fully isolated a given > set of CPUs. > > Suggested-by: Frederic Weisbecker > Signed-off-by: Waiman Long Acked-by: Frederic Weisbecker