On Fri, Aug 12, 2022 at 04:26:47PM -0400, Felix Kuehling wrote: > Hi workqueue maintainers, > > In the KFD (amdgpu) driver we found a need to schedule bottom half interrupt > handlers on CPU cores different from the one where the top-half interrupt > handler runs to avoid the interrupt handler stalling the bottom half in > extreme scenarios. See my latest patch that tries to use a different > hyperthread on the same CPU core, or falls back to a different core in the > same NUMA node if that fails: > https://lore.kernel.org/all/20220811190433.1213179-1-Felix.Kuehling@xxxxxxx/ > > Dave pointed out that the driver may not be the best place to implement such > logic and suggested that we should have an abstraction, maybe in the > workqueue code. Do you feel this is something that could or should be > provided by the core workqueue code? Or maybe some other place? I'm not necessarily against it. I guess it can be a flag on an unbound wq. Do the interrupts move across different CPUs tho? ie. why does this need to be a dynamic decision? Thanks. -- tejun
