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Diffstat (limited to 'results/classifier/gemma3:12b/device/1077838')
| -rw-r--r-- | results/classifier/gemma3:12b/device/1077838 | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/results/classifier/gemma3:12b/device/1077838 b/results/classifier/gemma3:12b/device/1077838 new file mode 100644 index 00000000..2655ad11 --- /dev/null +++ b/results/classifier/gemma3:12b/device/1077838 @@ -0,0 +1,31 @@ + +qemu-nbd -r -c taints device for subsequent usage, even after -d + +Something about qemu-nbd -r -c /dev/nbd0 someimg leaves cruft behind - subsequent connections get marked readonly. + +This is on quantal, haven't checked precise or raring. + +To demonstrate: +# use one image +qemu-img create -f qcow2 /tmp/1.qcow2 100M +sudo qemu-nbd -c /dev/nbd2 /tmp/1.qcow2 +sudo mkfs -t ext4 /dev/nbd2 +sudo qemu-nbd -d /dev/nbd2 +# use a second one on the same nbd device, shows that reuse works: +qemu-img create -f qcow2 /tmp/2.qcow2 100M +sudo qemu-nbd -c /dev/nbd2 /tmp/2.qcow2 +sudo mkfs -t ext4 /dev/nbd2 +sudo qemu-nbd -d /dev/nbd2 +# connect an image in read only mode +sudo qemu-nbd -r -c /dev/nbd2 /tmp/2.qcow2 +sudo dumpe2fs /dev/nbd2 | head -n 3 +sudo qemu-nbd -d /dev/nbd2 +# now try to reuse in read-write mode again: +qemu-img create -f qcow2 /tmp/3.qcow2 100M +sudo qemu-nbd -c /dev/nbd2 /tmp/3.qcow2 +sudo mkfs -t ext4 /dev/nbd2 +# here it goes boom: +mke2fs 1.42.5 (29-Jul-2012) +/dev/nbd2: Operation not permitted while setting up superblock +# still need to cleanup +sudo qemu-nbd -d /dev/nbd2 \ No newline at end of file |