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Diffstat (limited to 'results/classifier/118/review/1103868')
| -rw-r--r-- | results/classifier/118/review/1103868 | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/results/classifier/118/review/1103868 b/results/classifier/118/review/1103868 new file mode 100644 index 000000000..0ac718292 --- /dev/null +++ b/results/classifier/118/review/1103868 @@ -0,0 +1,123 @@ +architecture: 0.908 +files: 0.900 +permissions: 0.887 +device: 0.877 +PID: 0.857 +socket: 0.820 +user-level: 0.806 +arm: 0.802 +x86: 0.802 +performance: 0.773 +mistranslation: 0.762 +debug: 0.761 +peripherals: 0.758 +kernel: 0.756 +register: 0.741 +vnc: 0.736 +ppc: 0.723 +semantic: 0.721 +risc-v: 0.717 +network: 0.713 +boot: 0.698 +graphic: 0.684 +virtual: 0.684 +assembly: 0.637 +TCG: 0.633 +hypervisor: 0.622 +VMM: 0.332 +KVM: 0.326 +i386: 0.225 +-------------------- +x86: 0.981 +virtual: 0.824 +hypervisor: 0.803 +vnc: 0.667 +debug: 0.367 +device: 0.050 +register: 0.027 +files: 0.025 +PID: 0.021 +TCG: 0.017 +user-level: 0.010 +kernel: 0.010 +assembly: 0.005 +VMM: 0.005 +ppc: 0.004 +network: 0.004 +boot: 0.004 +KVM: 0.003 +semantic: 0.003 +risc-v: 0.003 +socket: 0.003 +peripherals: 0.003 +performance: 0.002 +i386: 0.002 +graphic: 0.002 +permissions: 0.002 +architecture: 0.002 +arm: 0.001 +mistranslation: 0.001 + +drive_mirror crashes on full disk copy of a resized disk with a backing file + +This bug was discovered using libvirt on ubuntu with a build of qemu 1.3 but it is trivailly reproducible with the curent git version. + +Repro steps: + +qemu-img create -f qcow2 base 32M +qemu-img create -f qcow2 -o backing_file=base disk +qemu-img resize /home/vishvananda/disk 64M +qemu-system-x86_64 -drive file=disk,id=vda -vnc :1 -monitor stdio +QEMU 1.3.0 monitor - type 'help' for more information +(qemu) drive_mirror -f vda test +Formatting 'test', fmt=qcow2 size=67108864 encryption=off cluster_size=65536 lazy_refcounts=off +qemu-system-x86_64: /build/buildd/qemu-1.3.0+dfsg/block/mirror.c:129: mirror_run: Assertion `n > 0' failed. +Aborted + +Note that the command works just fine if the front image is not resized: + +qemu-img create -f qcow2 base 32M +qemu-img create -f qcow2 -o backing_file=base disk +qemu-system-x86_64 -drive file=disk,id=vda -vnc :1 -monitor stdio + +or if the backing file is resized as well: + +qemu-img create -f qcow2 base 32M +qemu-img create -f qcow2 -o backing_file=base disk +qemu-img resize /home/vishvananda/disk 64M +qemu-img resize /home/vishvananda/base 64M +qemu-system-x86_64 -drive file=disk,id=vda -vnc :1 -monitor stdio + +or if we don't use -f when creating the mirror: + +QEMU 1.3.0 monitor - type 'help' for more information +(qemu) drive_mirror vda test +Formatting 'test', fmt=qcow2 size=33554432 backing_file='base' backing_fmt='qcow2' encryption=off cluster_size=65536 lazy_refcounts=off + +although in this final case the mirror is created the same size as the backing file which seems wrong: + +qemu-img info test +image: test +file format: qcow2 +virtual size: 32M (33554432 bytes) +disk size: 196K +cluster_size: 65536 +backing file: base +backing file format: qcow2 + +separated the final size issue into a separate bug here: + +https://bugs.launchpad.net/qemu/+bug/1103903 + +Haven't found a good workaround for this. Best I've come up with is to use the workaround described in the other bug and then coalesce the files afterwards via qemu-img convert + + + +Reformatted patch and submitted upstream: + +http://lists.gnu.org/archive/html/qemu-devel/2013-01/msg04585.html + +Patch has been included here: +http://git.qemu.org/?p=qemu.git;a=commitdiff;h=63ba17d39f1a8d262b31e +... so I think it's OK to close this bug now. + |