[HVM]xm-test: HANG during enforce_dom0_cpus

[HVM]xm-test: HANG during enforce_dom0_cpus

[Rick Gonzalez]

I see this problem in 32bit and 64bit. I start xmtest and everything 
is fine until it gets to enforce_dom0_cpus test case. xm-test just hangs 
during that test for ever. I enabled debug in Console.py and I get the 
following output after doing Ctrl-c:

[dom0] Running `/etc/init.d/xend start'
Traceback (most recent call last):
  File "./01_enforce_dom0_cpus_basic_pos.test", line 76, in ?
    status = restartXend()
  File "/usr/xen/xen-unstable.hg/tools/xm-test/lib/XmTestLib/Xm.py", 
line 207, in restartXend
    status, output = traceCommand("/etc/init.d/xend start")
  File "/usr/xen/xen-unstable.hg/tools/xm-test/lib/XmTestLib/Test.py", 
line 99, in traceCommand
    status, output = commands.getstatusoutput(command)
  File "/usr/lib64/python2.3/commands.py", line 59, in getstatusoutput
    tmp = pipe.read()
KeyboardInterrupt
FAIL: 01_enforce_dom0_cpus_basic_pos.test
===================
1 of 1 tests failed
===================
make[2]: *** [check-TESTS] Error 1
make[1]: *** [check-am] Interrupt
make: *** [check-recursive] Interrupt


It seems to be hanging in "pipe.read()" code. It seems to be waiting for 
something that never happens. It gets in this state after changing the 
vcpus to 1. The system is fine not crashing or anything like that.  
dmesg contains the following info:

Breaking affinity for irq 281
Breaking affinity for irq 282
Breaking affinity for irq 283
Breaking affinity for irq 284
Breaking affinity for irq 285
Breaking affinity for irq 286
Breaking affinity for irq 287
Breaking affinity for irq 288
Breaking affinity for irq 289
Breaking affinity for irq 290
Breaking affinity for irq 291
Breaking affinity for irq 292
Breaking affinity for irq 293
Breaking affinity for irq 294
Breaking affinity for irq 295
Breaking affinity for irq 296
Breaking affinity for irq 297
Breaking affinity for irq 298
Breaking affinity for irq 299
Breaking affinity for irq 300
Breaking affinity for irq 301
Breaking affinity for irq 302
Breaking affinity for irq 303


Any ideas?