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([2601:600:947f:f020:85dc:d2b2:c5ee:e3c4]) by smtp.gmail.com with ESMTPSA id af79cd13be357-8c09689153asm1727228085a.17.2025.12.26.12.45.13 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 26 Dec 2025 12:45:17 -0800 (PST) From: Waiman Long X-Google-Original-From: Waiman Long Message-ID: <8282d85f-37b6-4f39-a70a-de5e6c77fb0b@redhat.com> Date: Fri, 26 Dec 2025 15:45:12 -0500 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 20/33] timers/migration: Remove superfluous cpuset isolation test To: Frederic Weisbecker , LKML Cc: =?UTF-8?Q?Michal_Koutn=C3=BD?= , Andrew Morton , Bjorn Helgaas , Catalin Marinas , Chen Ridong , Danilo Krummrich , "David S . Miller" , Eric Dumazet , Gabriele Monaco , Greg Kroah-Hartman , Ingo Molnar , Jakub Kicinski , Jens Axboe , Johannes Weiner , Lai Jiangshan , Marco Crivellari , Michal Hocko , Muchun Song , Paolo Abeni , Peter Zijlstra , Phil Auld , "Rafael J . Wysocki" , Roman Gushchin , Shakeel Butt , Simon Horman , Tejun Heo , Thomas Gleixner , Vlastimil Babka , Will Deacon , cgroups@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-block@vger.kernel.org, linux-mm@kvack.org, linux-pci@vger.kernel.org, netdev@vger.kernel.org References: <20251224134520.33231-1-frederic@kernel.org> <20251224134520.33231-21-frederic@kernel.org> In-Reply-To: <20251224134520.33231-21-frederic@kernel.org> X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: ZXcXBeCS6nqTksff9jwgE0GY5KYUjqNjH55HQqyQNP0_1766781918 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Stat-Signature: hynwdk36t1e3wknx8wep7arht6ycp438 X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: BDB2E4000C X-Rspam-User: X-HE-Tag: 1766781920-638782 X-HE-Meta: U2FsdGVkX1+nQpAOF7ewiUYc6+mqBK/dMrzvJQlnrMF0SFLzwhbYHprbj2KVXAt57amNPfHTu+5f/baatNio8bDU6X0QB2MOhkHq3ip7Hc8GJ6D1YH2S6ud0SF0x5BehjxpNvq8f+lpvH0rFkBBsLRPh7jMFh6Jeu87xc5yZa7gihH80xc3HXM/rDWMHJzp4Yel2/K7sSedETSlr+bYGjZoTewHOZxsz1iYmws4E6R0hQNizhmepTUga7k11oBmhIMZaG/OJ3+QXfbzZBVhTx68x4JABhNpkwPq1Zv6rqYI16be7l6GnPRLCfHUE92Ks18BP3v3pErwIFRo/CKYQlCo1McfsXyKBYax3N96Ji9L3sGjqT083eWFMOCCSiJp7inaO00+igyKzDLJCbqgWjxbEny83y5WbBkAVLCCd0Q7bdQ/XyLSCAx6IHlpDDTsVlBWSYaBF+LZVRWytxSnfBmTIjC4AYmEEmWN3lkZqfMLpcyp4Jd0ewlUGeeexWIoTHyPc7Hsd6liAAwPABkKaVQouVilIkWmX0IRKzRnjEWGILgFi2x3x0yFQkHlCiX6RAMuAivS7VT3Xugos7gqEUT22xxLIbgLSwf0cs2dgumqz3IFj9FFWxzT2o2W2KwUkUHmBwskH67MLzb3e1ZFLuTe3tYeDPzet50ETIQo5JucZ3PkNMFiYu+qzTv7Ozz5niJl2byJ4foGhYMDj+sMsKAoP/1/cpXYTnWJ95nEYopAkaBO6BCOdVcUTxhqrQ0zVHr08+gJXauWQn4uPT3XSWbG7CGmHb8pHkyJjHbApBOfFn7MHa+EEMLk/Ki4EY4bfPYGHt7DIVCUPlHh83rLv6uwTPWkmTI+VRNegExrQtKTQiQeFEHDc2DI/kVzCMu3gwz20QL7h5V+Osnn3/rLDiV09eE5B+UxJdBJCrGkMzh76YKymBN5oE8GuhMENkkP7zc76KMa7YtET24xuh0b 4KVahZMJ 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 12/24/25 8:45 AM, Frederic Weisbecker wrote: > Cpuset isolated partitions are now included in HK_TYPE_DOMAIN. Testing > if a CPU is part of an isolated partition alone is now useless. > > Remove the superflous test. > > Signed-off-by: Frederic Weisbecker > --- > kernel/time/timer_migration.c | 5 ++--- > 1 file changed, 2 insertions(+), 3 deletions(-) > > diff --git a/kernel/time/timer_migration.c b/kernel/time/timer_migration.c > index 3879575a4975..6da9cd562b20 100644 > --- a/kernel/time/timer_migration.c > +++ b/kernel/time/timer_migration.c > @@ -466,9 +466,8 @@ static inline bool tmigr_is_isolated(int cpu) > { > if (!static_branch_unlikely(&tmigr_exclude_isolated)) > return false; > - return (!housekeeping_cpu(cpu, HK_TYPE_DOMAIN) || > - cpuset_cpu_is_isolated(cpu)) && > - housekeeping_cpu(cpu, HK_TYPE_KERNEL_NOISE); > + return (!housekeeping_cpu(cpu, HK_TYPE_DOMAIN) && > + housekeeping_cpu(cpu, HK_TYPE_KERNEL_NOISE)); > } > > /* Reviewed-by: Waiman Long