[Qemu-devel] qcow2 vs. image file format --> pci device

[Clemens Kolbitsch]

hi everyone!
i have a strange problem (at least to me it seems strange :-)  ):

i have implemented a pci device (Network IC) and it works just fine when using 
a standard image. however i now want to support snapshotting...

i started to convert my image into the qcow2 format and suddenly my code does 
not work any more... even if i uncomment everything that has to do with 
snapshotting in my code, it still blocks during qemu startup.

the thing that could cause this: i use 2 additional threads in my NIC code ... 
each is working with semaphores that might cause problems.

is there something in particular i have to be careful of when using qcow2 file 
format?

thanks!!