From: Waiman Long <longman@redhat.com>
To: "Tejun Heo" <tj@kernel.org>,
"Johannes Weiner" <hannes@cmpxchg.org>,
"Michal Koutný" <mkoutny@suse.com>
Cc: cgroups@vger.kernel.org, linux-kernel@vger.kernel.org,
Chen Ridong <chenridong@huawei.com>,
Gabriele Monaco <gmonaco@redhat.com>,
Frederic Weisbecker <frederic@kernel.org>,
Waiman Long <longman@redhat.com>
Subject: [cgroup/for-6.19 PATCH v3 3/5] cgroup/cpuset: Move up prstate_housekeeping_conflict() helper
Date: Tue, 4 Nov 2025 23:38:46 -0500 [thread overview]
Message-ID: <20251105043848.382703-4-longman@redhat.com> (raw)
In-Reply-To: <20251105043848.382703-1-longman@redhat.com>
Move up the prstate_housekeeping_conflict() helper so that it can be
used in remote partition code.
Signed-off-by: Waiman Long <longman@redhat.com>
---
kernel/cgroup/cpuset.c | 40 ++++++++++++++++++++--------------------
1 file changed, 20 insertions(+), 20 deletions(-)
diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c
index 99622e90991a..cc9c3402f16b 100644
--- a/kernel/cgroup/cpuset.c
+++ b/kernel/cgroup/cpuset.c
@@ -1432,6 +1432,26 @@ static bool isolated_cpus_can_update(struct cpumask *add_cpus,
return res;
}
+/*
+ * prstate_housekeeping_conflict - check for partition & housekeeping conflicts
+ * @prstate: partition root state to be checked
+ * @new_cpus: cpu mask
+ * Return: true if there is conflict, false otherwise
+ *
+ * CPUs outside of boot_hk_cpus, if defined, can only be used in an
+ * isolated partition.
+ */
+static bool prstate_housekeeping_conflict(int prstate, struct cpumask *new_cpus)
+{
+ if (!have_boot_isolcpus)
+ return false;
+
+ if ((prstate != PRS_ISOLATED) && !cpumask_subset(new_cpus, boot_hk_cpus))
+ return true;
+
+ return false;
+}
+
static void update_isolation_cpumasks(bool isolcpus_updated)
{
int ret;
@@ -1727,26 +1747,6 @@ static void remote_cpus_update(struct cpuset *cs, struct cpumask *xcpus,
remote_partition_disable(cs, tmp);
}
-/*
- * prstate_housekeeping_conflict - check for partition & housekeeping conflicts
- * @prstate: partition root state to be checked
- * @new_cpus: cpu mask
- * Return: true if there is conflict, false otherwise
- *
- * CPUs outside of boot_hk_cpus, if defined, can only be used in an
- * isolated partition.
- */
-static bool prstate_housekeeping_conflict(int prstate, struct cpumask *new_cpus)
-{
- if (!have_boot_isolcpus)
- return false;
-
- if ((prstate != PRS_ISOLATED) && !cpumask_subset(new_cpus, boot_hk_cpus))
- return true;
-
- return false;
-}
-
/**
* update_parent_effective_cpumask - update effective_cpus mask of parent cpuset
* @cs: The cpuset that requests change in partition root state
--
2.51.1
next prev parent reply other threads:[~2025-11-05 4:39 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-05 4:38 [cgroup/for-6.19 PATCH v3 0/5] cgroup/cpuset: Additional housekeeping check & cleanup Waiman Long
2025-11-05 4:38 ` [cgroup/for-6.19 PATCH v3 1/5] cgroup/cpuset: Rename update_unbound_workqueue_cpumask() to update_isolation_cpumasks() Waiman Long
2025-11-05 4:38 ` [cgroup/for-6.19 PATCH v3 2/5] cgroup/cpuset: Fail if isolated and nohz_full don't leave any housekeeping Waiman Long
2025-11-05 7:06 ` Chen Ridong
2025-11-05 4:38 ` Waiman Long [this message]
2025-11-05 6:18 ` [cgroup/for-6.19 PATCH v3 3/5] cgroup/cpuset: Move up prstate_housekeeping_conflict() helper Chen Ridong
2025-11-05 4:38 ` [cgroup/for-6.19 PATCH v3 4/5] cgroup/cpuset: Ensure domain isolated CPUs stay in root or isolated partition Waiman Long
2025-11-05 6:29 ` Chen Ridong
2025-11-05 4:38 ` [cgroup/for-6.19 PATCH v3 5/5] cgroup/cpuset: Globally track isolated_cpus update Waiman Long
2025-11-05 17:07 ` [PATCH v3 0/5] cgroup/cpuset: Additional housekeeping check & cleanup Tejun Heo
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