Hi,
I'm attaching the series of patches for handling huge number of
interrtupt sources. This patch is to increase vector spaces by
separating processors into some domains. This idea is the same as "per
node IDT" posted by Zwane Mwaikambo at:
http://marc.theaimsgroup.com/?l=linux-kernel&m=112103551401596&w=2
The ia64 linux already have vector sharing to handle huge number of
level-triggered interrupt sources via I/O SAPIC, but I think we also
need per domain vector approach because:
o Supporting vector shairng for edge-triggered interrupts is
difficult (or impossible)
o Vector domain approach has better performance than vector
sharing
o Need to support MSI based interrupts
This series of patches is still under development, and has following
TBD items.
o How to create vector domains
Need to consider how to create vector domains(per CPU?, per
node? or others...)
o MSI support
Attached patch only supports vector domain for I/O SAPIC
interrupts. We need to consider how to support vector domain for
MSI interrupts.
o /proc interface
o How to handle CPU hotplug
o and so on..
Any comments and questions are welcomed.
Thanks,
Kenji Kaneshige
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