Jesse wrote:
Marcelo Tosatti wrote:
Do you have preempt notifiers enabled in your host kernel?
No. And it looks like this is the real issue then. (Thank you for
reading between the lines and figuring out what was really wrong).
I compile the module apart from the kernel, so kvm support was not
enabled when compiling the kernel. In 2.6.24, the PREEMPT_NOTIFIER
option is not user selectable in make config, but is selected for you
when kvm support is selected. IMO, this makes building modules apart
from kernel source unadvised; however, there seems to be no alternative
with the pace of kvm development relative to the kernel release schedule.
If the host kernel doesn't have preempt notifiers enabled, then the kvm
external module emulates preempt notifiers. This emulation uses the
debug registers, and you mention that you are debugging guests, so that
may be the source of the problem.
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