From nobody Sun Feb 8 19:43:52 2026 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (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 C643D25570; Sun, 18 Aug 2024 06:23:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.142.43.55 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723962197; cv=none; b=l3atXeCBNmZ5vTcqqDIbbLZHMMVMMiILFy5NRTUvr+RfbN3GtU5uMDkCjNnrG6Mv1Whhv5M6JdtuP2MKMOm6Usn94CCBKPSOE0GLZx8ISLhkyPSxGc+xYobpzAH88YemmsL0PQrbrVxgknTgwAkxvabHf/mW+TLm3ZO0zEuswVo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723962197; c=relaxed/simple; bh=RCT1vw7GkOh44AOLZ/Rrzry2uj9NxrAN3qfjrgjN+7A=; h=Date:From:To:Subject:Cc:In-Reply-To:References:MIME-Version: Message-ID:Content-Type; b=Gc/OEe2+rgwtVCvPJw1eUlhIcHHaJISGhG6aH7vclYrtSkiTx9tNGP22jCijkwvMTort804rkXWyFtoXugbTl5z80Z86eP9TVvGpeFzZ4duCQtzKDCZK3kkEhAECPEUp+7bW+G9hXXYyvj4ZrIqNS7VENeZ7GUH+i6+S1CGoTQg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de; spf=pass smtp.mailfrom=linutronix.de; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=gBeiPQkb; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=byrPGRCN; arc=none smtp.client-ip=193.142.43.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linutronix.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="gBeiPQkb"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="byrPGRCN" Date: Sun, 18 Aug 2024 06:23:12 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1723962193; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=M7UOPGAHn8IblAR5C9mHoZ01Ujbmcoae+rmg4Gp0T5M=; b=gBeiPQkbd+xbUG6/LyvbY8+OaqSPeWoxffiNHN3eYsApMs0tXypc76punrgWpS9AAAhvkv WP+UAVz+7zAoWz84mCTXgXOQH4jr1Zt0WTYi+Wh3Mj+7RB48oGKNJAx9RNB0w5UfQh0HX1 rGvzq7KHG2jSZOo10zFopEn5nqnVCVYmFquBWf7AnlQqWVpOQOIBOrAVO21rNTCPKK8rRi 87K2IEYY7zGYiK7xHbUWYLlZNsAUSmuHguu2mJwW/PA3SkG+RHOlaq4eFj6BUbfEFOY2pg c3NgDtE3iQP4zV/t97PShaWYOF29jeuXfu+k6hf4y+0c5bd1koz/rQ249unItw== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1723962193; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=M7UOPGAHn8IblAR5C9mHoZ01Ujbmcoae+rmg4Gp0T5M=; b=byrPGRCNe750F7R/dW9dugT2Yh++/Jb3BQu5BCUEWnkhJpnI66j4zkK+BeMB14t72uoIJK FCOA+6shBDDK5SDQ== From: "tip-bot2 for Peter Zijlstra" Sender: tip-bot2@linutronix.de Reply-to: linux-kernel@vger.kernel.org To: linux-tip-commits@vger.kernel.org Subject: [tip: sched/core] sched/eevdf: Add feature comments Cc: "Peter Zijlstra (Intel)" , Valentin Schneider , x86@kernel.org, linux-kernel@vger.kernel.org In-Reply-To: <20240727105028.287790895@infradead.org> References: <20240727105028.287790895@infradead.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-ID: <172396219256.2215.1836630580131088615.tip-bot2@tip-bot2> Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails Precedence: bulk Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable The following commit has been merged into the sched/core branch of tip: Commit-ID: f25b7b32b0db6d71b07b06fe8de45b0408541c2a Gitweb: https://git.kernel.org/tip/f25b7b32b0db6d71b07b06fe8de45b040= 8541c2a Author: Peter Zijlstra AuthorDate: Sat, 14 Oct 2023 23:12:20 +02:00 Committer: Peter Zijlstra CommitterDate: Sat, 17 Aug 2024 11:06:40 +02:00 sched/eevdf: Add feature comments Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Valentin Schneider Tested-by: Valentin Schneider Link: https://lkml.kernel.org/r/20240727105028.287790895@infradead.org --- kernel/sched/features.h | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/kernel/sched/features.h b/kernel/sched/features.h index 929021f..97fb2d4 100644 --- a/kernel/sched/features.h +++ b/kernel/sched/features.h @@ -5,7 +5,14 @@ * sleep+wake cycles. EEVDF placement strategy #1, #2 if disabled. */ SCHED_FEAT(PLACE_LAG, true) +/* + * Give new tasks half a slice to ease into the competition. + */ SCHED_FEAT(PLACE_DEADLINE_INITIAL, true) +/* + * Inhibit (wakeup) preemption until the current task has either matched t= he + * 0-lag point or until is has exhausted it's slice. + */ SCHED_FEAT(RUN_TO_PARITY, true) =20 /*