eventinj in ubuntu_kvm_unit_tests timeout with T-3.13 amd64 on node gonzo

[Po-Hsu Lin]

Issue found on 3.13.0-190.241 with amd64 node gonzo.

This eventinj test will timeout with the default 90 seconds threshold in kvm-unit-tests, it's still failing even with timeout bumped to 600 seconds:

BUILD_HEAD=16647354
timeout -k 1s --foreground 600 /usr/bin/qemu-system-x86_64 --no-reboot -nodefaults -device pc-testdev -device isa-debug-exit,iobase=0xf4,iosize=0x4 -vnc none -serial stdio -device pci-testdev -machine accel=kvm -kernel /tmp/tmp.HAduwlASpz -smp 1 # -initrd /tmp/tmp.UEblGw7f40
enabling apic
paging enabled
cr0 = 80010011
cr3 = 1007000
cr4 = 20
Try to divide by 0
DE isr running divider is 0
Result is 150
PASS: DE exception
Try int 3
BP isr running
After int 3
PASS: BP exception
Sending vec 33 to self
irq1 running
After vec 33 to self
PASS: vec 33
Try int $33
irq1 running
After int $33
PASS: int $33
Sending vec 32 and 33 to self
irq1 running
irq0 running
After vec 32 and 33 to self
PASS: vec 32/33
Sending vec 32 and int $33
irq1 running
irq0 running
After vec 32 and int $33
PASS: vec 32/int $33
Sending vec 33 and 62 and mask one with TPR
irq1 running
After 33/62 TPR test
PASS: TPR
irq0 running
Before NP test
NP isr running 400ad8 err=18
irq1 running
After int33
PASS: NP exception
Sending NMI to self
NMI isr running 0x4061f4
Sending nested NMI to self
After nested NMI to self
qemu: terminating on signal 15 from pid 15212
FAIL eventinj (timeout; duration=600)

This is not a regression, as it can be reproduced with 3.13.0-170 as well.

Note that this timeout issue can be found on i386 node pepe. (bug 1955861)