On Wed, 13 May 2015 10:12:36 +0200 Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx> wrote: > * Steven Rostedt | 2015-05-11 20:15:06 [-0400]: > > >I'm backporting this to the stable releases, and I'm a bit worried > >about the above comment. The new Scheduler IPI code uses work queues and > >requires it to be done in a hard irq. > > The IPI part is only done for the high-prio which is only used by NOHZ. > Everyone else gets in via softiq as we did it before. > My push/pull RT tasks via IPI, uses the irq_work to do this. It has nothing to do with NOHZ, and will cause serious latencies if it is done by softirq. -- Steve -- 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
