On 05/09/2013 03:44 PM, Stefan Hajnoczi wrote:
On Wed, May 08, 2013 at 01:18:17PM +0800, yuxh wrote:
I have to consult you a qemu-img's problem.
Is this reasonable to create a file which is larger than the
available size of the fs by qemu-img cmd ?
When I use qemu-img create a file which is larger than the available
size of the fs, the creation is completed succesfully.
However when I use this file in guest as a guest's disk, and write
beyond the size the host file can provides, the guest was paused by
qemu-kvm or libvirt and was in maybe a infinite circle where the
guest just can't be used except I detach the disk from guest or
destroy the guest.
You can change the ENOSPC policy with -drive werror=,rerror=. See the
QEMU man page.
The default behavior is to pause the guest so the host admin can free up
or add space. Then the guest can be continued - this will retry the
I/O.
But you can also tell QEMU to pass the error through to the guest using
the -drive werror=,rerror= options.
Stefan
Oh, understand now.
Thank you so much for your explanation.
Yu
