From nobody Fri Apr 3 10:17:53 2026 Received: from out-172.mta1.migadu.com (out-172.mta1.migadu.com [95.215.58.172]) (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 F20A03ED5BE for ; Tue, 24 Mar 2026 12:03:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=95.215.58.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774353827; cv=none; b=reFCOQpBQLk0XJ441a8TmmS8ern5prhk0ZeSNiZV5ofe9wZDJvLXRheCHLKZfB6Na27QTpO7ll3HOHhLm6JYvoXAXzz95RdLsTFSHpkD0Mw0Nt3/L4zp1i49RAW/2OHk5TjS2c6DmXSZFwYDWNak6rrxRbJp9C7fXadAosCOQJU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774353827; c=relaxed/simple; bh=OgwMl9BBU59wkO4jMeeKBXKQP4qdej0R2bWwj5cNAdw=; h=From:To:Cc:Subject:Date:Message-Id; b=oNCdUwFwsmwPtseoddAjljerIioal8us6ozNjwfsxzOLWRAVpZe5fV3bVV4lKP1XUS80a3EN9+t4yOzsGw8wDSsLlTHMWjkiry3owJyQzsqcHJ8yw3peBkGnSg7nQmwOyn7HmqPzQUkMDo1xvzE37ZlW+vKtbKBYxxYaY4UbKHo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=t/Th6maK; arc=none smtp.client-ip=95.215.58.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="t/Th6maK" X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1774353814; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc; bh=UnDG+AGpSBMOmqf3u00JXWeFG2eqQ9lAlo9mgy+QKxI=; b=t/Th6maKReuc7r2LThxo8Y+POJcgazu7v1Ec4zTLYD/F36nvvMoRrC8weZtovnVPFHjibL 3kG/uBoMKG5xU4YOCe9gLhupQAilT4RL3Hf+wy012vJNs9BlRjRW9yeCJmRQeK/pY92JDX 5eU1ZyiK6BTdqgTTuHVZqs6Z2BBgebk= From: Zqiang To: tj@kernel.org, void@manifault.com, arighi@nvidia.com, changwoo@igalia.com Cc: sched-ext@lists.linux.dev, linux-kernel@vger.kernel.org, qiang.zhang@linux.dev Subject: [PATCH] sched_ext: Choose the right sch->ops.name to output in the print_scx_info() Date: Tue, 24 Mar 2026 20:03:13 +0800 Message-Id: <20260324120313.12632-1-qiang.zhang@linux.dev> X-Migadu-Flow: FLOW_OUT Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" This commit use the scx_task_sched_rcu() to get task->scx.sched structure to correctly output, instead of always using scx_root in the print_scx_info(). Signed-off-by: Zqiang --- kernel/sched/ext.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/kernel/sched/ext.c b/kernel/sched/ext.c index 2472231ec556..5d670b50da3d 100644 --- a/kernel/sched/ext.c +++ b/kernel/sched/ext.c @@ -7680,14 +7680,18 @@ static void kick_cpus_irq_workfn(struct irq_work *i= rq_work) */ void print_scx_info(const char *log_lvl, struct task_struct *p) { - struct scx_sched *sch =3D scx_root; + struct scx_sched *sch; enum scx_enable_state state =3D scx_enable_state(); const char *all =3D READ_ONCE(scx_switching_all) ? "+all" : ""; char runnable_at_buf[22] =3D "?"; struct sched_class *class; unsigned long runnable_at; =20 - if (state =3D=3D SCX_DISABLED) + guard(rcu)(); + + sch =3D scx_task_sched_rcu(p); + + if (!sch || state =3D=3D SCX_DISABLED) return; =20 /* --=20 2.17.1