From nobody Thu Dec 18 19:04:46 2025 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 6AF7D144D1C; Mon, 29 Jul 2024 10:34:07 +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=1722249248; cv=none; b=Ds0YC0VmzTEdury+kiWz1Q+JzrV46C/3wu4t4ACGgK7ZCQCadU3uXEtgmlPLWiXAJlSZnmj5E0ijXSAzWdwT6YjRm648WAYyKo9v+wT4a/1ueMdRomHkiV2dKb5ImbT3qRP+U9ojh+eOpdjeXAPAK0jK8A5mpA22A2gWG1NLGbE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722249248; c=relaxed/simple; bh=1Gu/BwbVyxNpNEF2ghbILEElXyBh4CHct/dZDeV0MBc=; h=Date:From:To:Subject:Cc:In-Reply-To:References:MIME-Version: Message-ID:Content-Type; b=L4PxsxupK5yw0sIMWu7l2XnPV32s2nNsXJ9HRtU2EaANoSAdjOCGSk4vB5T+3msOePk3cGiNsXcjhclZOIGnFBzkDarW7LffwNEbfxx9V3e1+QlOF1IYaVizYxn+Uv8PL5VBgL8UxzCMPco0cJi/LbMhPRLb47VMtTKB9mdyhwo= 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=nLkHtIAP; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=vxxWEbg+; 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="nLkHtIAP"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="vxxWEbg+" Date: Mon, 29 Jul 2024 10:34:04 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1722249245; 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=d7qTIvPVCEXEdQ+t7xlLPFPDr6k3pN/0/6MLHA6SjIc=; b=nLkHtIAPVoSEJNtvOC+3QNuaobQw/LNcwtQ2bPMfyBL3XLzA7f1rzoUJ0ID7k0xZpNkGxm ugIALmhusNiUUhAEMsO2RJ3HqIeZUCTRaZWxu+VgfsZZzCtsOILp2o0cvhjxxXEPDoejaB SbCo+PWtgp+7EzDHjca7AiDfAjNJOuvExUgaFfOS6dXjX6B0xs/dLw0bxQD4/Of/ZJbONj pZQQVcgUFfvYFQEcbcmiWm3PxBRp0Xq/CmSVpNkbHLjlJYiVgUOfl0dkvB1Wlst8Vrcyw3 v57OpBUjX4l04/vd/dJ8dGjJ0jd70gHN1B6TwwgVAlJxyUvmgkog1FVK1Uf4XA== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1722249245; 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=d7qTIvPVCEXEdQ+t7xlLPFPDr6k3pN/0/6MLHA6SjIc=; b=vxxWEbg+F0Rc0aD96wAoYccPbYoF7Ri92H/ql+ve5KnzrQYQaezss38g/OKTxejAkna8+i 0ELJRoGU4sS2sVDg== From: "tip-bot2 for Youssef Esmat" Sender: tip-bot2@linutronix.de Reply-to: linux-kernel@vger.kernel.org To: linux-tip-commits@vger.kernel.org Subject: [tip: sched/core] sched/core: Clear prev->dl_server in CFS pick fast path Cc: Youssef Esmat , Daniel Bristot de Oliveira , "Peter Zijlstra (Intel)" , Juri Lelli , stable@vger.kernel.org, x86@kernel.org, linux-kernel@vger.kernel.org In-Reply-To: <7f7381ccba09efcb4a1c1ff808ed58385eccc222.1716811044.git.bristot@kernel.org> References: <7f7381ccba09efcb4a1c1ff808ed58385eccc222.1716811044.git.bristot@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-ID: <172224924493.2215.13390344179986374598.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: a741b82423f41501e301eb6f9820b45ca202e877 Gitweb: https://git.kernel.org/tip/a741b82423f41501e301eb6f9820b45ca= 202e877 Author: Youssef Esmat AuthorDate: Mon, 27 May 2024 14:06:49 +02:00 Committer: Peter Zijlstra CommitterDate: Mon, 29 Jul 2024 12:22:35 +02:00 sched/core: Clear prev->dl_server in CFS pick fast path In case the previous pick was a DL server pick, ->dl_server might be set. Clear it in the fast path as well. Fixes: 63ba8422f876 ("sched/deadline: Introduce deadline servers") Signed-off-by: Youssef Esmat Signed-off-by: Daniel Bristot de Oliveira Signed-off-by: Peter Zijlstra (Intel) Tested-by: Juri Lelli Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/7f7381ccba09efcb4a1c1ff808ed58385eccc222.17= 16811044.git.bristot@kernel.org --- kernel/sched/core.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/kernel/sched/core.c b/kernel/sched/core.c index e61da3b..1074ae8 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -5840,6 +5840,13 @@ __pick_next_task(struct rq *rq, struct task_struct *= prev, struct rq_flags *rf) } =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. */