From nobody Mon Feb 9 14:31:12 2026 Received: from mail-pg1-f202.google.com (mail-pg1-f202.google.com [209.85.215.202]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A4C5F1AE030 for ; Tue, 13 Aug 2024 23:57:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.202 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723593474; cv=none; b=jUQuhJ6PZ1k/nTFBLCgddducLXEoHRK0u9jfBpWMCmb2R5vvRbWMyolQS4LqCa6P4/cL/p3F6bM3BHfrDffkSuByVJMQZkPgw1TcJh1XflI7ndMBzUuizl8kzejG1KC1sxc5xubLkbpposUq6NJP7nmerGv77xjxFRNNSt9ANYE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723593474; c=relaxed/simple; bh=v1wXxV9ZA+NDtCThJ9NcLLcQESem98LeLzRfDLxECQs=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=J+k+qL/Kf3hENrXBttFDGeUJtp1gMftdFgr3t5TOeDH0mF3ynvKTHqLba8v5PtLBhNnvyvuFFZouG5Ye6wm/pn1gVjxUXKMcLhHGLG+KDrBbsgaWnneVhTRW+YAHBxI0Wvc4K7IuDZTtSIjYEjRhziS6nlqqHKHwY8WronNIe9k= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--jstultz.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=iavBV1XH; arc=none smtp.client-ip=209.85.215.202 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--jstultz.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="iavBV1XH" Received: by mail-pg1-f202.google.com with SMTP id 41be03b00d2f7-7a28217cfecso5474579a12.2 for ; Tue, 13 Aug 2024 16:57:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1723593472; x=1724198272; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=QUZmHciByNs0lKefLuCTbO3bdK4dWgPt635eSO9BfM8=; b=iavBV1XH57QWij/zK21bClxmboB113mTVN3J0drbvSqZSpYKvZ1FHBfGC2q7MPktgb VZ4xCC8EmrPRvL73BkcrA5I2SLfSVn5JGFhfHxoZOefp960C2BqbqC2rM4cLvwM4dwma a1HUVTqsgRg+rBnRdm16WJ8kTB9lu6iHNUV60D4BHxJoY/YooIwwAjdvFFvdTSLQX61+ lcE5rQZ7DalLx5PWekNF5rELnUP5RXjiFR0QsisQFSHXfN8s057d0vYV/P6A/PsPShdn OeG3Yl5/AI8toKBHYCBFrVXPAKvRwwjIcjAEYvw8l3AQVgZ0EJsFF5eJH4B4vkW2+2be og7A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1723593472; x=1724198272; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=QUZmHciByNs0lKefLuCTbO3bdK4dWgPt635eSO9BfM8=; b=GsuS13GvRKZoNayR69aZfaqVB8Aui+numu6SFkriK6rRICNQMF9CVULMvAJ1lxcO75 XeSoxWyotuujyH6eh4Ku05gDkF4X45Wq6bDEZus0kuO3vJontHxfbUlvzao78yo3YRVx 0312W7bpoD4y+pSE5cKOm/6YOan45jqYNVhsxZ+PGmRHU5wzvWW+MTs5woqRQeCCLj1N AbUxKVIQNN2Jeb26qeZY7pVYeAw9CFU9WOTm65MHpAhb6NsHiqnNRmc3MniOIBz4ZtvV 6mjPOTHwLY6X9td2KlKRGQ5lBDNRyAdp1xbczH99b0gn/BGZ2fh0yqm1zfmofiabjFM+ L3/Q== X-Gm-Message-State: AOJu0YxFs5G44w4RnXnTJwdjTj+TfJT0A4dFCZR6mhvX3drRlz5KjE8m eRD1lLiuxpXtcGFUTQnu51abl3TnhvpDL5Y/Yk4b5tjNb92VhlhUEVy+XA9VtLxVuCXza67cGZM FSmKbhJba5XdFecG6qsq+BdLc5X5L2fbROeDno6jynP9UDvCSXPJM88gWtELgB8bGvs+iADqEQm xFwUv7ny7Wo+PxPhW4pXXs36JElpPy/Crn5gr4MY6jWhUd X-Google-Smtp-Source: AGHT+IEivARax7OmduQSeXk59tWfeTR3wKWE0qctFvaPNbUX3CJHvEE3SBZgk6ti6VCAXBtquQRyfUA8skGO X-Received: from jstultz-noogler2.c.googlers.com ([fda3:e722:ac3:cc00:24:72f4:c0a8:600]) (user=jstultz job=sendgmr) by 2002:a63:2584:0:b0:718:2a63:47a1 with SMTP id 41be03b00d2f7-7c6a56c4173mr1475a12.3.1723593471014; Tue, 13 Aug 2024 16:57:51 -0700 (PDT) Date: Tue, 13 Aug 2024 16:57:25 -0700 In-Reply-To: <20240813235736.1744280-1-jstultz@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20240813235736.1744280-1-jstultz@google.com> X-Mailer: git-send-email 2.46.0.76.ge559c4bf1a-goog Message-ID: <20240813235736.1744280-6-jstultz@google.com> Subject: [PATCH v12 5/7] sched: Consolidate pick_*_task to task_is_pushable helper From: John Stultz To: LKML Cc: "Connor O'Brien" , Joel Fernandes , Qais Yousef , Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Valentin Schneider , Steven Rostedt , Ben Segall , Zimuzo Ezeozue , Mel Gorman , Will Deacon , Waiman Long , Boqun Feng , "Paul E. McKenney" , Metin Kaya , Xuewen Yan , K Prateek Nayak , Thomas Gleixner , Daniel Lezcano , kernel-team@android.com, Metin Kaya , John Stultz Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Connor O'Brien This patch consolidates rt and deadline pick_*_task functions to a task_is_pushable() helper This patch was broken out from a larger chain migration patch originally by Connor O'Brien. Cc: Joel Fernandes Cc: Qais Yousef Cc: Ingo Molnar Cc: Peter Zijlstra Cc: Juri Lelli Cc: Vincent Guittot Cc: Dietmar Eggemann Cc: Valentin Schneider Cc: Steven Rostedt Cc: Ben Segall Cc: Zimuzo Ezeozue Cc: Mel Gorman Cc: Will Deacon Cc: Waiman Long Cc: Boqun Feng Cc: "Paul E. McKenney" Cc: Metin Kaya Cc: Xuewen Yan Cc: K Prateek Nayak Cc: Thomas Gleixner Cc: Daniel Lezcano Cc: kernel-team@android.com Tested-by: K Prateek Nayak Tested-by: Metin Kaya Reviewed-by: Metin Kaya Reviewed-by: Valentin Schneider Signed-off-by: Connor O'Brien [jstultz: split out from larger chain migration patch, renamed helper function] Signed-off-by: John Stultz --- v7: * Split from chain migration patch * Renamed function v11: * Switched to bool (though later in the series it goes to a tri-state return) for now to simplify review. Will add tri-state handling later in the series when its needed. Suggested by Metin and others. --- kernel/sched/deadline.c | 10 +--------- kernel/sched/rt.c | 11 +---------- kernel/sched/sched.h | 10 ++++++++++ 3 files changed, 12 insertions(+), 19 deletions(-) diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c index ac60d2819bd1d..d3050f6c2958d 100644 --- a/kernel/sched/deadline.c +++ b/kernel/sched/deadline.c @@ -2183,14 +2183,6 @@ static void task_fork_dl(struct task_struct *p) /* Only try algorithms three times */ #define DL_MAX_TRIES 3 =20 -static int pick_dl_task(struct rq *rq, struct task_struct *p, int cpu) -{ - if (!task_on_cpu(rq, p) && - cpumask_test_cpu(cpu, &p->cpus_mask)) - return 1; - return 0; -} - /* * Return the earliest pushable rq's task, which is suitable to be executed * on the CPU, NULL otherwise: @@ -2209,7 +2201,7 @@ static struct task_struct *pick_earliest_pushable_dl_= task(struct rq *rq, int cpu if (next_node) { p =3D __node_2_pdl(next_node); =20 - if (pick_dl_task(rq, p, cpu)) + if (task_is_pushable(rq, p, cpu)) return p; =20 next_node =3D rb_next(next_node); diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c index 496d3e6ab57d2..9f07f09641f7a 100644 --- a/kernel/sched/rt.c +++ b/kernel/sched/rt.c @@ -1790,15 +1790,6 @@ static void put_prev_task_rt(struct rq *rq, struct t= ask_struct *p) /* Only try algorithms three times */ #define RT_MAX_TRIES 3 =20 -static int pick_rt_task(struct rq *rq, struct task_struct *p, int cpu) -{ - if (!task_on_cpu(rq, p) && - cpumask_test_cpu(cpu, &p->cpus_mask)) - return 1; - - return 0; -} - /* * Return the highest pushable rq's task, which is suitable to be executed * on the CPU, NULL otherwise @@ -1812,7 +1803,7 @@ static struct task_struct *pick_highest_pushable_task= (struct rq *rq, int cpu) return NULL; =20 plist_for_each_entry(p, head, pushable_tasks) { - if (pick_rt_task(rq, p, cpu)) + if (task_is_pushable(rq, p, cpu)) return p; } =20 diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index d2cc31c2457e5..10ef612c078f9 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -3586,6 +3586,16 @@ void move_queued_task_locked(struct rq *src_rq, stru= ct rq *dst_rq, struct task_s set_task_cpu(task, dst_rq->cpu); activate_task(dst_rq, task, 0); } + +static inline +bool task_is_pushable(struct rq *rq, struct task_struct *p, int cpu) +{ + if (!task_on_cpu(rq, p) && + cpumask_test_cpu(cpu, &p->cpus_mask)) + return true; + + return false; +} #endif =20 #ifdef CONFIG_RT_MUTEXES --=20 2.46.0.76.ge559c4bf1a-goog