Hi Linus, > The __set_task_cpu() function does various other things too: > > set_task_rq(p, cpu); > #ifdef CONFIG_SMP > /* > * After ->cpu is set up to a new value, task_rq_lock(p, ...) > can be > * successfuly executed on another CPU. We must ensure that > updates of > * per-task data have been completed by this moment. > */ > smp_wmb(); > task_thread_info(p)->cpu = cpu; > p->wake_cpu = cpu; > #endif > > which makes me worry about just setting the thread_info->cpu value. > That set_task_rq() initializes various group scheduling things, an > dthat whole "wake_cpu" thing seems relevant too.
Yeah, I would definitely like the scheduler guys to weigh in on this, especially considering how difficult it can be to hit. Anton _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
