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 92A00268FDB for ; Thu, 13 Mar 2025 17:08:27 +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=1741885707; cv=none; b=GKqfJtN1kO+jVyvasE30edWUZhMJkYt5xr5GDn2x1KvjTRP0biIanHhKCg+HZ60HmKtw3coZsjZui1bjMtkDlMkxdnHFQwag5KV7ARVTnTL5dmXYMOIQhNqpGWB3EAX6Rxd/XrgNj8BaOPVTr/qp34nkC96sLYvokiI37+szuVk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741885707; c=relaxed/simple; bh=QAUHNbSDOYstTbGDXDcCiRiWP+fJLKO7uJTAdJrfDC4=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=I6BSt00fg2dE3kel+pbwGfxHFVzNaTuUPG+WbXliB+RYpb/eo1Y0fCXEJStvfJ1SO1jWz8vupAFeUxV88QuddvgjaGwyRYFk9KtHMLHKiojQuyO1Zjpu2ntUcDMi2f7OKL0fMyXhp0ApP505LAnm+BqUqCUuPWcG5J90LEJVZ8A= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=at5SdzpL; 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="at5SdzpL" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E48F6C4CEDD; Thu, 13 Mar 2025 17:08:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1741885707; bh=QAUHNbSDOYstTbGDXDcCiRiWP+fJLKO7uJTAdJrfDC4=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=at5SdzpLLgv7fg5PK22Q17mPwZ1XLhLrRS/iW7iWtWkKKdFnf5Ak69l++27WkxVLb pVF7CMx7yUFoUAooq/j+j/q10u6nSXWm6iecIMiyCAQrEUXoXfSvWiD7dsWppk1hlo RmaRsTZbx9R9bE5VHZeUZY9oe/nbpqPQuCCtXZZs5nxtLKpmIfw5zr+XA3T6rXYhiM /Zmtm/eMu6jT9A/p5gCToYAtARYDTtroSSApXbvzLvss4/fKjNT1HXByxmL9YplUr/ S6bMu9+9G1O+8jyORCCkppTeqfXRwN1MLZIZi9/6Vlq/9UdIQOn5AFFq2M5kw+TkuC iNlMDSYXy3/Tw== Date: Thu, 13 Mar 2025 07:08:25 -1000 From: Tejun Heo To: Andrea Righi Cc: David Vernet , Changwoo Min , Joel Fernandes , linux-kernel@vger.kernel.org Subject: Re: [PATCH] sched_ext: Skip per-CPU tasks in scx_bpf_reenqueue_local() Message-ID: References: <20250313170321.99510-1-arighi@nvidia.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: <20250313170321.99510-1-arighi@nvidia.com> On Thu, Mar 13, 2025 at 06:03:21PM +0100, Andrea Righi wrote: > scx_bpf_reenqueue_local() can be invoked from ops.cpu_release() to give > tasks that are queued to the local DSQ a chance to migrate to other > CPUs, when a CPU is taken by a higher scheduling class. > > However, there is no point re-enqueuing tasks that can only run on that > particular CPU, as they would simply be re-added to the same local DSQ > without any benefit. > > Therefore, skip per-CPU tasks in scx_bpf_reenqueue_local(). > > Signed-off-by: Andrea Righi Applied to sched_ext/for-6.15. Thanks. -- tejun