If CONFIG_CPUSETS=n then "case cpuset" changes the state and runs the already failed for_each_cpu() loop again for no reason.
Signed-off-by: Oleg Nesterov <[email protected]> --- kernel/sched/core.c | 12 +++++++----- 1 files changed, 7 insertions(+), 5 deletions(-) diff --git a/kernel/sched/core.c b/kernel/sched/core.c index e4fa6be..b421e24 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -1335,13 +1335,15 @@ static int select_fallback_rq(int cpu, struct task_struct *p) goto out; } + /* No more Mr. Nice Guy. */ switch (state) { case cpuset: - /* No more Mr. Nice Guy. */ - cpuset_cpus_allowed_fallback(p); - state = possible; - break; - + if (IS_ENABLED(CONFIG_CPUSETS)) { + cpuset_cpus_allowed_fallback(p); + state = possible; + break; + } + /* fall-through */ case possible: do_set_cpus_allowed(p, cpu_possible_mask); state = fail; -- 1.5.5.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
