On Fri, Jun 21, 2019 at 03:45:52PM +0800, xiaoggchen@xxxxxxxxxxx wrote: > From: chen xiaoguang <xiaoggchen@xxxxxxxxxxx> > > This patch set introduces a new scheduler, we name it BT scheduler > for the moment. > The BT scheduler is similar with the CFS scheduler. We also use the > rb-tree as the run queue to save the runnable tasks. And the vruntime > concept is also used in the BT scheduler. And the priority of BT scheduler > is from 140 to 179. So now the schedulers in the kernel are as follows: > deadline, RT, CFS, BT and idle. NAK; it has no forward progress guarantees. This is also the reason why SCHED_IDLE is not a true idle time scheduler but a very low weight CFS tasks. It also has some very 'interesting' starvation cases, consider one of your BT tasks owns a mutex, but then there are there are runnable CFS tasks. The BT task will never get runtime and release the mutex. Also; NAK at all the duplication.
