From nobody Wed Dec 31 12:02:26 2025 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 DD1D515E5A7; Mon, 27 May 2024 12:07:21 +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=1716811642; cv=none; b=k5TsEj0jwjxpkK+KDic/tIuZb7VUlpzZF5jHi/T8zbK7mUlcgznrHFsGqZvH6RvcxyaXKWNjB2U/OAtvshfJuzzxj08nwJM5x4wpb0rKDLhM9FhBO6PADTUEVfETT3a7w+ktmP5z4UAfnIF+Devw/g7024TnKndV7QQizbkK3DI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716811642; c=relaxed/simple; bh=Q6HzBW3LSaYAiupiLhOT8oiqFvjivNTjzbPPDIc2uag=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=sgjF6yUmTZXJK8BIhdTOg4TvZSSDB2+hc2NTGAgdBXnNtETaRJ49Iwndd7DG+SyDAKIDDLtOhak3OgJwHeghLpc4wxM948TYZbo9pioKpTXVbgZxEaKcpG3mpekF2LPo6lYyGBv7pF9lgdDCENSc4aYIIb/o56mNJFCiLkX68Po= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Co8LEJEC; 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="Co8LEJEC" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 74073C32781; Mon, 27 May 2024 12:07:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1716811641; bh=Q6HzBW3LSaYAiupiLhOT8oiqFvjivNTjzbPPDIc2uag=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Co8LEJEC5qMAS74RlTJm3Yh8502ch8clR/rtF3N1j6+Iyfo3a22VBtL2dObBypVhO iIYNu/iJpmzvMuGytXdALpMTIwYFJtlMjCXNqISEAOCYzUUCrx++iFB/xVq5OJh3Q/ EHEpyBUoY9eLa58JZfMrGMC6yhN+rdHEi8QcDEys+S+pHZOW9cgmfKL9m/CFccgItR PESfW6ZfI/Zw6eY2Pn2mHj2kYtwwxb/7vw1NUYn94ST99X+J4tzJw8GpEF40WfC8tF LjP4IgdjTUGGrm2PyRSdzVIwDYFqaeXkUx3BgJq4IcF5uRNfwjoFBgW68+hR+802fV Xzgo4CjhgQSOg== From: Daniel Bristot de Oliveira To: Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot Cc: Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Daniel Bristot de Oliveira , Valentin Schneider , linux-kernel@vger.kernel.org, Luca Abeni , Tommaso Cucinotta , Thomas Gleixner , Joel Fernandes , Vineeth Pillai , Shuah Khan , bristot@kernel.org, Phil Auld , Suleiman Souhlal , Youssef Esmat , stable@vger.kernel.org Subject: [PATCH V7 3/9] sched/core: Clear prev->dl_server in CFS pick fast path Date: Mon, 27 May 2024 14:06:49 +0200 Message-ID: <7f7381ccba09efcb4a1c1ff808ed58385eccc222.1716811044.git.bristot@kernel.org> X-Mailer: git-send-email 2.45.1 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Youssef Esmat In case the previous pick was a DL server pick, ->dl_server might be set. Clear it in the fast path as well. Cc: stable@vger.kernel.org Fixes: 63ba8422f876 ("sched/deadline: Introduce deadline servers") Signed-off-by: Youssef Esmat Signed-off-by: Joel Fernandes (Google) Signed-off-by: Daniel Bristot de Oliveira --- kernel/sched/core.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 08c409457152..6d01863f93ca 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -6044,6 +6044,13 @@ __pick_next_task(struct rq *rq, struct task_struct *= prev, struct rq_flags *rf) p =3D pick_next_task_idle(rq); } =20 + /* + * This is a normal CFS pick, but the previous could be a DL pick. + * Clear it as previous is no longer picked. + */ + if (prev->dl_server) + prev->dl_server =3D NULL; + /* * This is the fast path; it cannot be a DL server pick; * therefore even if @p =3D=3D @prev, ->dl_server must be NULL. --=20 2.45.1