[Qemu-devel] qemu hangs when reading disk images (OS X)

[C . W . Betts]

I have noticed that qemu hangs when I launch it.  from what I can  
tell, it seems to be based on the reading of disk images:  Here's a  
sample taken from the PowerPC build:
Sampling process 12004 for 3 seconds with 1 millisecond of run time  
between samples
Sampling completed, processing symbols...
Analysis of sampling qemu-system-ppc (pid 12004) every 1 millisecond
Call graph:
    2542 Thread_2503
      2542 start
        2542 main
          2542 -[NSApplication run]
            2542 -[NSApplication  
nextEventMatchingMask:untilDate:inMode:dequeue:]
              2542 _DPSNextEvent
                2542 AEProcessAppleEvent
                  2542 aeProcessAppleEvent
                    2542 dispatchEventAndSendReply(AEDesc const*,  
AEDesc*)
                      2542 aeDispatchAppleEvent(AEDesc const*,  
AEDesc*, unsigned int, unsigned char*)
                        2542 _NSAppleEventManagerGenericHandler
                          2542 -[NSAppleEventManager  
dispatchRawAppleEvent:withRawReply:handlerRefCon:]
                            2542 - 
[NSApplication(NSAppleEventHandling) _handleCoreEvent:withReplyEvent:]
                              2542 - 
[NSApplication(NSAppleEventHandling) _handleAEOpen:]
                                2542 -[NSApplication  
_sendFinishLaunchingNotification]
                                  2542 -[NSApplication  
_postDidFinishNotification]
                                    2542 -[NSNotificationCenter  
postNotificationName:object:userInfo:]
                                      2542  
_CFXNotificationPostNotification
                                        2542 _nsnote_callback
                                          2542 - 
[QemuCocoaAppController startEmulationWithArgc:argv:]
                                            2542 qemu_main
                                              2542 ppc_heathrow_init
                                                2542  
pci_cmd646_ide_init
                                                  2542 ide_init2
                                                    2542  
bdrv_guess_geometry
                                                      2542 bdrv_read_em
                                                        2542 select 
$DARWIN_EXTSN
                                                          2542 select 
$DARWIN_EXTSN

Total number in stack (recursive counted multiple, when >=5):

Sort by top of stack, same collapsed (when >= 5):
        select$DARWIN_EXTSN        2542
Sample analysis of process 12004 written to file /dev/stdout