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Thu, 31 Jul 2025 03:55:51 -0700 (PDT) Received: from victus-lab ([193.205.81.5]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3b79c4696c8sm1946025f8f.55.2025.07.31.03.55.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 31 Jul 2025 03:55:51 -0700 (PDT) From: Yuri Andriaccio To: Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Valentin Schneider Cc: linux-kernel@vger.kernel.org, Luca Abeni , Yuri Andriaccio Subject: [RFC PATCH v2 09/25] sched/deadline: Account rt-cgroups bandwidth in sched_dl_global_validate Date: Thu, 31 Jul 2025 12:55:27 +0200 Message-ID: <20250731105543.40832-10-yurand2000@gmail.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250731105543.40832-1-yurand2000@gmail.com> References: <20250731105543.40832-1-yurand2000@gmail.com> 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" sched_dl_global_validate (similarly to the previous patch) must take into account the rt-cgroups' reserved bandwidth. Signed-off-by: Yuri Andriaccio --- kernel/sched/deadline.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c index 43af48038b9..55b7f883815 100644 --- a/kernel/sched/deadline.c +++ b/kernel/sched/deadline.c @@ -3098,11 +3098,17 @@ int sched_dl_global_validate(void) u64 period =3D global_rt_period(); u64 new_bw =3D to_ratio(period, runtime); u64 cookie =3D ++dl_cookie; + u64 dl_groups_root =3D 0; u64 fair_bw; struct dl_bw *dl_b; int cpu, ret =3D 0; unsigned long cap, flags; =20 +#ifdef CONFIG_RT_GROUP_SCHED + dl_groups_root =3D to_ratio(root_task_group.dl_bandwidth.dl_period, + root_task_group.dl_bandwidth.dl_runtime); +#endif + /* * Here we want to check the bandwidth not being set to some * value smaller than the currently allocated bandwidth in @@ -3119,7 +3125,7 @@ int sched_dl_global_validate(void) fair_bw =3D dl_bw_fair(cpu); =20 raw_spin_lock_irqsave(&dl_b->lock, flags); - if (cap_scale(new_bw, cap) < dl_b->total_bw) + if (cap_scale(new_bw, cap) < dl_b->total_bw + cap_scale(dl_groups_root, = cap)) ret =3D -EBUSY; if (cap_scale(new_bw, cap) + fair_bw > cap_scale(BW_UNIT, cap)) ret =3D -EBUSY; --=20 2.50.1