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Tue, 11 Nov 2025 05:23:20 -0800 (PST) X-Google-Smtp-Source: AGHT+IGe1fKVQI0AQKeaP66S8xfEpPORcNRZK/N21beU9RAcDdbI5LvO+jNso89AWWHaGKhwDZJIqw== X-Received: by 2002:a05:6000:430b:b0:42b:3302:f7d0 with SMTP id ffacd0b85a97d-42b3302fd03mr7861849f8f.22.1762867400204; Tue, 11 Nov 2025 05:23:20 -0800 (PST) Received: from jlelli-thinkpadt14gen4.remote.csb ([151.29.129.40]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-42b2c6d3f67sm22048989f8f.37.2025.11.11.05.23.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 11 Nov 2025 05:23:19 -0800 (PST) Date: Tue, 11 Nov 2025 14:23:17 +0100 From: Juri Lelli To: Pingfan Liu Cc: linux-kernel@vger.kernel.org, Waiman Long , Chen Ridong , Peter Zijlstra , Pierre Gondois , Ingo Molnar , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Valentin Schneider Subject: Re: [PATCHv5] sched/deadline: Walk up cpuset hierarchy to decide root domain when hot-unplug Message-ID: References: <20251110014706.8118-1-piliu@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On 11/11/25 19:40, Pingfan Liu wrote: > Hi Juri, > > Thanks for your review. Please see the comments below. ... > Since there's no way to handle memory allocation failures, could it be > done by using alloc_cpumask_var() in init_sched_dl_class() to reserve > the memory for this purpose? Maybe something similar to local_cpu_mask_dl (or use local_cpu_mask_dl directly?), I'm thinking.