[RFC][PATCH 0/3]: Fixes to IRQ routing

Chris Lalancette
2010-06-08T17:57:19Z

As we've discussed previously, here is a series of patches to
fix some of the IRQ routing issues we have in KVM. With this series
in place I was able to successfully kdump a RHEL-5 64-bit, and RHEL-6
32- and 64-bit guest on CPU's other than the BSP. RHEL-5 32-bit kdump still
does not work; it gets stuck on "Checking 'hlt' instruction". However,
it does that both before and after this series, so there is something
else going on there that I still have to debug.

I also need to change the "kvm_migrate_pit_timer" function to migrate the
timer over to the last CPU that handled the timer interrupt, on the
theory that that particlar CPU is likely to handle the timer interrupt again
in the near future.

The other outstanding question about these patches is how to setup the
workqueue. As it stands I have a single workqueue for all guests. However,
for efficiency reasons we may want to have one workqueue per guest. Opinions?

Chris Lalancette