diff options
| author | Andrea Righi <arighi@nvidia.com> | 2025-06-03 10:22:01 +0200 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2025-06-03 08:22:27 -1000 |
| commit | 9960be72a54cf0e4d47abdd4cacd1278835a3bb4 (patch) | |
| tree | c2c13b7dc738518ee92caec9ce365d99927897f6 | |
| parent | ee9a4e92799d72b1a2237d76065562b1f1cf334f (diff) | |
sched_ext: idle: Skip cross-node search with !CONFIG_NUMA
In the idle CPU selection logic, attempting cross-node searches adds
unnecessary complexity when CONFIG_NUMA is disabled.
Since there's no meaningful concept of nodes in this case, simplify the
logic by restricting the idle CPU search to the current node only.
Fixes: 48849271e6611 ("sched_ext: idle: Per-node idle cpumasks")
Signed-off-by: Andrea Righi <arighi@nvidia.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
| -rw-r--r-- | kernel/sched/ext_idle.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/kernel/sched/ext_idle.c b/kernel/sched/ext_idle.c index 9477fbb8d625..6d29d3cbc670 100644 --- a/kernel/sched/ext_idle.c +++ b/kernel/sched/ext_idle.c @@ -138,6 +138,7 @@ found: goto retry; } +#ifdef CONFIG_NUMA /* * Tracks nodes that have not yet been visited when searching for an idle * CPU across all available nodes. @@ -186,6 +187,13 @@ static s32 pick_idle_cpu_from_online_nodes(const struct cpumask *cpus_allowed, i return cpu; } +#else +static inline s32 +pick_idle_cpu_from_online_nodes(const struct cpumask *cpus_allowed, int node, u64 flags) +{ + return -EBUSY; +} +#endif /* * Find an idle CPU in the system, starting from @node. |