On Thu, 15 Aug 2013 13:59:49 -0700 spdev31 <spdev31@xxxxxxxxx> wrote: > Hi, > > I see the workqueue scheduling policys defaults to SCHED_FIFO with the > 2.6.33 RT patch but is SCHED_NORMAL with the 3.0 RT patch (and newer > RT patches, I believe). Can you help me understand the reason for > using realtime policies for 2.6.33 RT workqueues and non-realtime > policies for 3.0 RT patch workqueues? > Actually, mainline kernel set workqueues as SCHED_FIFO for 2.6.33 and no longer does that for 3.0 kernels. Has nothing to do with the -rt patch. But as for why they did that switch. Probably because there's no reason that the workqueues need to be running as a high priority task, just like ksoftirqd runs as SCHED_OTHER in mainline. -- 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
