On Mon, May 17, 2021 at 3:47 PM Thomas Gleixner <tglx@xxxxxxxxxxxxx> wrote: > > Nitesh, > > On Mon, May 17 2021 at 14:21, Nitesh Lal wrote: > > On Mon, May 17, 2021 at 1:26 PM Robin Murphy <robin.murphy@xxxxxxx> wrote: > > > > We can use irq_set_affinity() to set the hint mask as well, however, maybe > > there is a specific reason behind separating those two in the > > first place (maybe not?). > > Yes, because kernel side settings might overwrite the hint. > > > But even in this case, we have to either modify the PMU drivers' IRQs > > affinity from the userspace or we will have to make changes in the existing > > request_irq code path. > > Adjusting them from user space does not work for various reasons, > especially CPU hotplug. > > > I am not sure about the latter because we already have the required controls > > to adjust the device IRQ mask (by using default_smp_affinity or by modifying > > them manually). > > default_smp_affinity does not help at all and there is nothing a module > can modify manually. Right, it will not help a module. > > I'll send out a patch series which cleans that up soon. Ack, thanks. > > Thanks, > > tglx > > -- Nitesh
