Am 22.07.2011 10:21, schrieb Pekka Enberg: > On Thu, 21 Jul 2011, Kevin Wolf wrote: >> Hm, I must have missed this patch on the KVM mailing list... > > It wasn't on the list, sorry. > >> You should also error out before creating a new L2 table as its refcount >> would have to be updated, too. On the other hand, the patch is a bit too >> restrictive, because it applies the check to qcow1 which doesn't even >> have a refcount table. > > Oh, right, I broken QCOW1. > >> I'm not sure if everyone is aware of it, so another hint: Now that you >> can't grow qcow2 any more, you might find it useful to use qemu-img >> create -f qcow2 -o preallocation=metadata, so that all clusters are >> already present and you don't get random failures. > > Yup, I'm aware that you can't grow images anymore. The patch was meant as > a stop-gap measure while I'm hacking on refcount table support. Yeah, I was pretty sure you were aware of _that_, but maybe not everyone knows that metadata preallocation exists. Kevin -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
