Messages in this thread | | | Date | Wed, 2 Nov 2022 17:54:06 -0500 | From | Bjorn Helgaas <> | Subject | Re: [PATCH 1/2] cxl/pci: Add generic MSI-X/MSI irq support |
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On Wed, Nov 02, 2022 at 10:15:24AM -0700, Davidlohr Bueso wrote: > On Tue, 25 Oct 2022, Bjorn Helgaas wrote: > ...
> > The MSI case is ugly because the Interrupt Message Number can change > > when we set Multiple Message Enable. Maybe we can separate it out and > > have a less than optimal solution for this case, like allocating one > > or two vectors and polling if that's not enough. I expect most > > devices will support MSI-X. > > Would only supporting MSI-X be so terrible?
My gut feeling is that polling when MSI-X isn't supported wouldn't be terrible, but I have no data on how common devices that only support MSI are.
Bjorn
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