[Qemu-devel] some confusion on qemu i/o pocess and the qcow2 format

[??????]

1.what is the difference of bdrv_co_readv and bdrv_aio_readv??
2.I am confused about the I/O pocess of qcow2, i find. Can anybody tell me the 
detail pocess? or arethere any useful tools to trace the pocess?