Messages in this thread Patch in this message | | | Date | Wed, 17 Jun 2020 14:17:42 +0200 | From | Sebastian Andrzej Siewior <> | Subject | [PATCH] sched: __set_cpus_allowed_ptr(): Check cpus_mask, not cpus_ptr |
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From: Scott Wood <swood@redhat.com>
This function is concerned with the long-term cpu mask, not the transitory mask the task might have while migrate disabled. Before this patch, if a task was migrate disabled at the time __set_cpus_allowed_ptr() was called, and the new mask happened to be equal to the cpu that the task was running on, then the mask update would be lost.
Signed-off-by: Scott Wood <swood@redhat.com> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> --- kernel/sched/core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -1637,7 +1637,7 @@ static int __set_cpus_allowed_ptr(struct goto out; } - if (cpumask_equal(p->cpus_ptr, new_mask)) + if (cpumask_equal(&p->cpus_mask, new_mask)) goto out; /*
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