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([2601:188:c102:b180:1f8b:71d0:77b1:1f6e]) by smtp.gmail.com with ESMTPSA id af79cd13be357-8b2aef2f9bbsm38251885a.31.2025.11.12.18.06.52 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 12 Nov 2025 18:06:52 -0800 (PST) From: Waiman Long X-Google-Original-From: Waiman Long Message-ID: <3b3b49df-c215-4f7d-b2c6-628eac823134@redhat.com> Date: Wed, 12 Nov 2025 21:06:51 -0500 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH RFC v2 13/22] cpuset: introduce local_partition_update() To: Chen Ridong , tj@kernel.org, hannes@cmpxchg.org, mkoutny@suse.com Cc: cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, lujialin4@huawei.com, chenridong@huawei.com References: <20251025064844.495525-1-chenridong@huaweicloud.com> <20251025064844.495525-14-chenridong@huaweicloud.com> Content-Language: en-US In-Reply-To: <20251025064844.495525-14-chenridong@huaweicloud.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 10/25/25 2:48 AM, Chen Ridong wrote: > From: Chen Ridong > > The local_partition_update() function replaces the command partcmd_update > previously handled within update_parent_effective_cpumask(). The update > logic follows a state-based approach: > > 1. Validation check: First verify if the local partition is currently valid > 2. Invalidation handling: If the partition is invalid, trigger invalidation > 3. State transition: If an invalid partition has no errors, transition to > valid > 4. cpumasks updates: For local partition that only cpu maks changes, use "cpumask" > partition_update() to handle partition change. > > Signed-off-by: Chen Ridong > --- > kernel/cgroup/cpuset.c | 153 +++++++++++++++++++++++++++++++++++++++-- > 1 file changed, 148 insertions(+), 5 deletions(-) > > diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c > index 73a43ab58f72..49df38237c1d 100644 > --- a/kernel/cgroup/cpuset.c > +++ b/kernel/cgroup/cpuset.c > @@ -1822,6 +1822,59 @@ static void remote_cpus_update(struct cpuset *cs, struct cpumask *xcpus, > remote_partition_disable(cs, tmp); > } > > +static bool is_user_cpus_exclusive(struct cpuset *cs) Should we name this "is_user_xcpus_exclusive"? Cheers, Longman