On Wednesday, December 08, 2010 01:09:25 pm Hanno Böck wrote: > Hi, > > I tried a relatively simple task with qemu-kvm. I have two qcow hd images > and try to create filesystems on them using a gentoo installation disk. qcow2 (I hope you are using that vs just qcow) is known to be a tad on the slow side on metadata heavy operations (i.e. mkfs, installing lots of files, etc.). One trick some of us use is to use the -drive syntax (vs -hda) and set the cache option to unsafe or writeback for the install process. The other alternative is to use preallocated raw images (i.e. made with dd vs qemu-img). I've been informed that in 0.12.5 the writeback trick won't do any good due to some extra fsync()s. So your best bet is to upgrade to 0.13 and use cache=unsafe. > > Starting qemu with: > qemu -m 512 -cdrom install-x86-minimal-20101116.iso -hda hda.img -hdb > hdb.img > > > However, mkfs always hangs indefinitely. Doesn't really matter if ext2/3/4, > it always hangs at > "Writing superblocks and filesystem accounting information:" Have you tried strace'ing to see if it's actually doing something (just very slowly)? > > Any idea where to start looking for the problem? (please cc me as I'm not > subscribed to this list) -- 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
