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| author | Yury Norov <yury.norov@gmail.com> | 2023-08-19 07:12:37 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2023-09-15 13:48:11 +0200 |
| commit | 9ecea9ae4d3127a09fb5dfcea87f248937a39ff5 (patch) | |
| tree | bc676d77c146063b8ee461264d4905262692e6d9 /kernel/sched/topology.c | |
| parent | 8ab63d418d4339d996f80d02a00dbce0aa3ff972 (diff) | |
| download | linux-stable-9ecea9ae4d3127a09fb5dfcea87f248937a39ff5.tar.gz linux-stable-9ecea9ae4d3127a09fb5dfcea87f248937a39ff5.tar.bz2 linux-stable-9ecea9ae4d3127a09fb5dfcea87f248937a39ff5.zip | |
sched/topology: Handle NUMA_NO_NODE in sched_numa_find_nth_cpu()
sched_numa_find_nth_cpu() doesn't handle NUMA_NO_NODE properly, and
may crash kernel if passed with it. On the other hand, the only user
of sched_numa_find_nth_cpu() has to check NUMA_NO_NODE case explicitly.
It would be easier for users if this logic will get moved into
sched_numa_find_nth_cpu().
Signed-off-by: Yury Norov <yury.norov@gmail.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Mel Gorman <mgorman@suse.de>
Link: https://lore.kernel.org/r/20230819141239.287290-6-yury.norov@gmail.com
Diffstat (limited to 'kernel/sched/topology.c')
| -rw-r--r-- | kernel/sched/topology.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c index 423d08947962..a60ecf45360c 100644 --- a/kernel/sched/topology.c +++ b/kernel/sched/topology.c @@ -2126,6 +2126,9 @@ int sched_numa_find_nth_cpu(const struct cpumask *cpus, int cpu, int node) struct cpumask ***hop_masks; int hop, ret = nr_cpu_ids; + if (node == NUMA_NO_NODE) + return cpumask_nth_and(cpu, cpus, cpu_online_mask); + rcu_read_lock(); /* CPU-less node entries are uninitialized in sched_domains_numa_masks */ |