My recent ioapic investigation has been painful and has taken me all
over the place. One of my conclusions is that our code for dealing with
ioapics on i386 and x86_64 is a mess that has been growing for years.
I saw tremendous amounts of fodder for cleanup patches. Ugh.
When deciding how much to include in the patchset for addressing the irq
migrations problems that have cropped up in the x86_64 code I really
wanted to keep the patchset small and minimal. But I needed to make
some substantial changes so I would have a low priority IPI I could use
for ensuring irq migration was complete. When trying to throw out
patches I kept finding things that were either bug fixes or relevant
cleanups to the problem I was addressing.
So this patchset is bigger than I would for addressing the issue irq
migration issue but there is nothing that isn't a simple cleanup or
isn't a real bug fix. So I think we need it all one way or another.
I have lost track of who has what in which tree or who it makes sense
to send this to. So this patchset is against Linus's latest git tree.
And hopefully we can include this in 2.6.21.
Eric
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