> On 2013/2/1 5:57, Kirill Tkhai wrote: > >> 31.01.2013, 20:08, "Steven Rostedt" <rostedt@xxxxxxxxxxx>: >> >>> On Mon, 2013-01-28 at 03:46 +0400, Kirill Tkhai wrote: >>> >>>> The patch aims to decrease the number of calls of push_rt_task() >>>> in push_rt_tasks(). >>>> >>>> It's not necessary to push more than 'num_online_cpus() - 1' tasks. >>>> If just pushed task doesn't leave its new CPU during our local call >>>> of push_rt_tasks() than we won't push another task to the CPU. >>>> If it leave or change priority than it will pull new task by itself. >>> >>> I'm curious. Have you hit situations where this was an issue? Or was >>> this just discovered by code review? >> >> No, I did't hit this situation. It's impossible to hook every situation. >> >> Thanks for your explanation. >> >> Kirill > > Suppose we have a large number of cpus(say 4096), with the last one running > a low-priority task on it. Is it possible with this patch we will never reach > the last cpu in case that previous cpu has complete the pulled task? Yes. But this patch is about several pushable tasks on the same cpu. Kirill -- -- 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
