hulk inclusion category: bugfix bugzilla: https://atomgit.com/openeuler/kernel/issues/8397 CVE: NA ---------------------------------------- The current logic skips updating task's prefer_cpus in a cgroup when the cgroup's prefer_cpus is unchanged. However, task's prefer_cpus may mismatch the cgroup config in some cases, causing inconsistent CPU affinity. Comment out the early return logic to ensure task's prefer_cpus are always updated on cgroup.prefer_cpus writes, aligning task and cgroup settings. Fixes: 243865da2684 ("cpuset: Introduce new interface for scheduler dynamic affinity") Signed-off-by: Chen Jinghuang <chenjinghuang2@huawei.com> --- kernel/cgroup/cpuset.c | 4 ---- 1 file changed, 4 deletions(-) diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c index 1f6ed08af9f5..60c5ee2bc463 100644 --- a/kernel/cgroup/cpuset.c +++ b/kernel/cgroup/cpuset.c @@ -748,10 +748,6 @@ static int update_prefer_cpumask(struct cpuset *cs, struct cpuset *trialcs, return retval; } - /* Nothing to do if the cpus didn't change */ - if (cpumask_equal(cs->prefer_cpus, trialcs->prefer_cpus)) - return 0; - if (!cpumask_subset(trialcs->prefer_cpus, cs->cpus_allowed)) return -EINVAL; -- 2.34.1