On Mon, 2 Oct 2017, Thomas Gleixner wrote: > On Mon, 2 Oct 2017, Daniel Drake wrote: > 2) The affinity setting of straight MSI interrupts (w/o remapping) on x86 > requires to make the affinity change from the interrupt context of the > current active vector in order not to lose interrupts or worst case > getting into a stale state. > > That works for single vectors, but trying to move all vectors in one > go is more or less impossible, as there is no reliable way to > determine that none of the other vectors is on flight. > > There might be some 'workarounds' for that, but I rather avoid that > unless we get an official documented one from Intel/AMD. Thinking more about it. That might be actually a non issue for MSI, but we have that modus operandi in the current code and we need to address that first before even thinking about multi MSI support. Thanks, tglx
