From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) (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 5474B23A99E for ; Tue, 14 Oct 2025 19:33:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.155.50.34 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760470390; cv=none; b=YkPNVKXgSoudyeh1B0gn9zO1MgmbDEzP+v6NGhCqHQ/JqSEL8O9Xq8lMY78OKlFF7XoZvDk2U9T/TKpKT19HTALwA3Z4sF0SL7zMwvG77Qp7v6ATs1KZHm8GIf4ZBnWpSKNSMPx/Irbd8uMTI9d/QoQK6AAT2VkBqV5qJhANsRI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760470390; c=relaxed/simple; bh=lYoyy2SA1f2lUurrSBXzp92VvsodTAx20rR69AMykyo=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=MtJYGWnFBsWFysFdnsYsVPdCEmCpt1tzRUi3sKGWrvY5NJcEol8o3OUrhO5AQzN64v2/g4eL+Wq+ckpE5AiWOZkS8fu865bc8anoOodxG6X21otUfOlLw0ThZFfqN2KqasTumjbnH+RZY23nepeecCfxd02QfNmzAZalQoJivbA= 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=JVcmS4Pr; arc=none smtp.client-ip=90.155.50.34 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="JVcmS4Pr" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=lYoyy2SA1f2lUurrSBXzp92VvsodTAx20rR69AMykyo=; b=JVcmS4PrNOuBepTT1bSwOUWGd6 Fsw8qAbYWbqxVXTdkcWa642Bvw1jFZ2XKSf5N2H0LCmKtQigQI07fX4Qzcv6RjmbmxCU3Q10qTA2t wE26gr339LLxt4t3azLnyTSAjguXsNKotHDMx2SQYvQLoO+zY6UW3+VT2/ynZUnTdn87h39vu4LVc aJi4DSZcuh9CnJ2ceU9yQuauy+P3P4koWODgOQmaD9N4PrQQqB72mtd/uFYHWC4gMCkPEvt5GtoYn Y4Eu0pk0+uBeFFNFd68Y0haxIa5OX+p6ooQmaPj81CCZ8CTpAJEx6uYnzXPnQp4tuhRoxt9PyUCwS yY/BJQRQ==; Received: from 77-249-17-252.cable.dynamic.v4.ziggo.nl ([77.249.17.252] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.98.2 #2 (Red Hat Linux)) id 1v8klY-0000000GjnV-2JCl; Tue, 14 Oct 2025 19:33:01 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 1000) id 550BB300212; Tue, 14 Oct 2025 21:33:00 +0200 (CEST) Date: Tue, 14 Oct 2025 21:33:00 +0200 From: Peter Zijlstra To: Juri Lelli Cc: Gabriele Monaco , linux-kernel@vger.kernel.org, Ingo Molnar , Clark Williams Subject: Re: [RFC PATCH] sched/deadline: Avoid dl_server boosting with expired deadline Message-ID: <20251014193300.GA1206438@noisy.programming.kicks-ass.net> References: <20251007122904.31611-1-gmonaco@redhat.com> <20251014095407.GM4067720@noisy.programming.kicks-ass.net> <20251014102541.GS3245006@noisy.programming.kicks-ass.net> <83a5971ef07226737421737f889795ec57b6fa6c.camel@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=us-ascii Content-Disposition: inline In-Reply-To: On Tue, Oct 14, 2025 at 06:01:10PM +0200, Juri Lelli wrote: > Shouldn't idle time be accounted (subtracted from runtime) as well, though? Argh, indeed. Then I suppose we should look at bringing some of that 'idle-for-whole-period' logic to try and actually stop the timer at some point if nothing happens.