On 05.07.2019 12:47, Philippe Mathieu-Daudé wrote: > On 7/5/19 12:43 PM, Kamil Rytarowski wrote: >> On 05.07.2019 12:24, Alex Bennée wrote: >>> >>> Gerd Hoffmann <kra...@redhat.com> writes: >>> >>>> Instead of fetching the prebuilt image from patchew download the install >>>> iso and prepare the image locally. Install to disk, using the serial >>>> console. Create qemu user, configure ssh login. Install packages >>>> needed for qemu builds. >>> >>> I've had to drop this from my v3 PR as Peter was seeing a very >>> slow/hanging install when running his merge tests. I've tried to >>> reproduce and I see it stall while installing packages but nowhere near >>> the delay Peter has seen. >>> >>> Any pointers on how to debug gratefully received. >>> >> >> Does it use virtio? There were performance issues with virio disk device. > > Yes, virtio-blk, you can see how the VM is started looking at > tests/vm/basevm.py: > > "-drive", > "file=%s,if=none,id=%s,cache=writeback,format=raw" % (tarfile, name), > > "-device", > "virtio-blk,drive=%s,serial=%s,bootindex=1" % (name, name) >
Try to switch to a non-virtio option and retry.
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