On Mon, 14 Jul 2014 19:09:48 -0500 Corey Minyard <cminyard@xxxxxxxxxx> wrote: > Can we get: > > tracing-use-migrate_disable-to-prevent-beeing-pushed.patch Sure except that patch is buggy: - preempt_disable(); + migrate_disable(); /* The update must run on the CPU that is being updated. */ if (cpu_id == smp_processor_id() || !cpu_online(cpu_id)) rb_update_pages(cpu_buffer); else { - /* - * Can not disable preemption for schedule_work_on() - * on PREEMPT_RT. - */ - preempt_enable(); schedule_work_on(cpu_id, &cpu_buffer->update_pages_work); wait_for_completion(&cpu_buffer->update_done); - preempt_disable(); } - preempt_enable(); + migrate_enable(); migrate_disable() on non-PREEMPT_RT is preempt_disable(). You can't call wait_or_completion with preemption disabled. When that gets fixed in mainline -rt, I'll add it to the stable branches too. -- Steve > > into 3.10, also? > -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html