On Tue, 2019-09-17 at 16:57 +0200, Sebastian Andrzej Siewior wrote: > On 2019-07-27 00:56:32 [-0500], Scott Wood wrote: > > 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. > > lost as in "would not be carried out" I assume. Right. The old mask would be restored upon migrate_enable() even though that's no longer the policy that was requested. -Scott
