On Wed 16 Jan 2019 02:15:24 AM CET, james harvey wrote: > I ran: > > # qemu-img convert /var/lib/libvirt/images/win7.qcow2 -O raw > /mnt/tmpqcow/win7.raw > > 45 minutes later, qemu-img had been running with 100% CPU every time I > checked, and it had allocated the raw file, but still hadn't actually > written a single byte: (note the dd in the VM completed the 90GB in > about 8 minutes)
[...] > After running this long, I ran strace for 15 seconds, here: > https://termbin.com/gg9k -- It's repeatedly running lseek with > SEEK_DATA and SEEK_HOLE. The SEEK_HOLE always results in 96251936768, > and SEEK_DATA is different results. It seems like the problem addressed by this patch: https://lists.gnu.org/archive/html/qemu-block/2019-01/msg00246.html Berto
