exception vs SIGALRM race (with test-case now!)

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22.06.2021 01:33, Jim Mattson пишет:
I'm guessing that your core2duo doesn't have a VMX preemption timer,
and this has some subtle effect on how the alarm interrupts VMX
non-root operation. On the i7, try setting the module parameter
preemption_timer to 0.

Hi again.

I wrote a reliable test-case to
check your suggestion.
Unfortunately, no luck on I7,
even with

---

$ cat /sys/module/kvm_intel/parameters/preemption_timer
N

$ cat /sys/module/kvm_intel/parameters/unrestricted_guest
N

---


But the Core2 owners reproduce
the problem immediately using my
test-case:
https://github.com/dosemu2/dosemu2/issues/1500#issuecomment-867221736

The test-case:
https://github.com/dosemu2/dosemu2/issues/1500#issuecomment-867215291

The source of it:
https://github.com/dosemu2/dosemu2/issues/1500#issuecomment-867215913

Now the question is: can anyone
from that list please replicate our
setup and reproduce the problem
on Core2 CPU, and then fix it?
I myself do not have such CPU, so
I probably can't do that on my own.




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