Running this:
$ virt-builder fedora-23 -o vm1.qcow2 --format qcow2 \
--root-password password:123456 --selinux-relabel --size 100G
And, importing vm1.qcow2 into libvirt results in these "corrupted
metadata buffer" errors, in a continuous loop, on the serial console:
[...]
[ 51.687988] XFS (vda3): First 64 bytes of corrupted metadata buffer:
[ 51.688938] ffff8800bad08a00: 58 41 47 46 00 00 00 01 00 00 00 4f 00 04 e9
00 XAGF.......O....
[ 51.690212] ffff8800bad08a10: 00 00 00 01 00 00 00 02 00 00 00 00 00 00 00
01 ................
[ 51.691486] ffff8800bad08a20: 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00
76 ...............v
[ 51.692767] ffff8800bad08a30: 00 00 00 00 00 04 e8 fb 00 04 e8 fb 00 00 00
00 ................
[ 51.694054] XFS (vda3): metadata I/O error: block 0xc1f3801
("xfs_trans_read_buf_map") error 117 numblks 1
[ 51.695814] XFS (vda3): Metadata corruption detected at
xfs_agf_read_verify+0x70/0x120 [xfs], block 0xc468001
[ 51.697312] XFS (vda3): Unmount and run xfs_repair
[ 51.698057] XFS (vda3): First 64 bytes of corrupted metadata buffer:
[ 51.699012] ffff8800bad08a00: 58 41 47 46 00 00 00 01 00 00 00 50 00 02 d2
c0 XAGF.......P....
[ 51.700296] ffff8800bad08a10: 00 00 00 01 00 00 00 02 00 00 00 00 00 00 00
01 ................
[ 51.701581] ffff8800bad08a20: 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00
76 ...............v
[ 51.702872] ffff8800bad08a30: 00 00 00 00 00 02 d2 bb 00 02 d2 bb 00 00 00
00 ................
[ 51.704166] XFS (vda3): metadata I/O error: block 0xc468001
("xfs_trans_read_buf_map") error 117 numblks 1
[ 51.705779] systemd-journald[327]: /dev/kmsg buffer overrun, some messages
lost.
[ 51.717069] XFS (vda3): Metadata corruption detected at
xfs_agf_read_verify+0x70/0x120 [xfs], block 0x29b
[...]
I could reproduce it twice so far with QCOW2 image _and_ raw image
formats.
Notably, these errors occur only when the image is resized (as is the
case above).
I confirmed this by testing both the default raw & QCOW2 Fedora-23 image
(_without_ the "--size 100G"), there are no such corrupted metadata
errors in either case, and I get the login prompt on the serial console
just fine.
I'm using these on the host:
libguestfs-tools-c-1.32.3-2.fc23.x86_64
libguestfs-xfs-1.32.3-2.fc23.x86_64
qemu-system-x86-2.4.1-7.fc23.x86_64
kernel-4.4.4-301.fc23.x86_64
--
/kashyap
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