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When I use 4.4.0-62-generic　kernel, I can mount kvm image file.
But when I use 4.4.0-116-generic or 119　kernel, I can't mount the kvm image
file.
Is there some way to mount the kvm image file on 4.4.0-116-generic later kernel?
- release
root@ofaci1:~# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.04.4 LTS
Release: 16.04
Codename: xenial
root@ofaci1:~#
- packages
root@ofaci1:~# dpkg -l | egrep "qemu|mount|linux-image-4.4.0-11"
ii cgroupfs-mount 1.2
all Light-weight package to set up cgroupfs mounts
ii ipxe-qemu 1.0.0+git-20150424.a25a16d-1ubuntu1.2
all PXE boot firmware - ROM images for qemu
ii libmount1:amd64 2.27.1-6ubuntu3.4
amd64 device mounting library
ii linux-image-4.4.0-116-generic 4.4.0-116.140
amd64 Linux kernel image for version 4.4.0 on 64 bit x86 SMP
ii linux-image-4.4.0-119-generic 4.4.0-119.143
amd64 Linux kernel image for version 4.4.0 on 64 bit x86 SMP
ii mount 2.27.1-6ubuntu3.4
amd64 tools for mounting and manipulating filesystems
ii qemu-block-extra:amd64 1:2.5+dfsg-5ubuntu10.24
amd64 extra block backend modules for qemu-system and qemu-utils
ii qemu-kvm 1:2.5+dfsg-5ubuntu10.24
amd64 QEMU Full virtualization
ii qemu-system-common 1:2.5+dfsg-5ubuntu10.24
amd64 QEMU full system emulation binaries (common files)
ii qemu-system-x86 1:2.5+dfsg-5ubuntu10.24
amd64 QEMU full system emulation binaries (x86)
ii qemu-utils 1:2.5+dfsg-5ubuntu10.24
amd64 QEMU utilities
root@ofaci1:~#
- Use 4.4.0-62-generic
root@ofaci1:~# uname -a
Linux ofaci1 4.4.0-62-generic #83-Ubuntu SMP Wed Jan 18 14:10:15 UTC 2017
x86_64 x86_64 x86_64 GNU/Linux
root@ofaci1:~# qemu-nbd --connect /dev/nbd1 /opt/ci-pool/slave1.qcow2
root@ofaci1:~# fdisk /dev/nbd1
Welcome to fdisk (util-linux 2.27.1).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
Command (m for help): p
Disk /dev/nbd1: 40 GiB, 42949672960 bytes, 83886080 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x000dfd65
Device Boot Start End Sectors Size Id Type
/dev/nbd1p1 2048 3905535 3903488 1.9G 82 Linux swap / Solaris
/dev/nbd1p2 * 3905536 83884031 79978496 38.1G 83 Linux
Command (m for help): q
root@ofaci1:~# mount /dev/nbd1p2 /mnt/d1
root@ofaci1:~# ls /mnt/d1
bin etc initrd.img.old lost+found opt run sys var
boot home lib media proc sbin tmp vmlinuz
dev initrd.img lib64 mnt root srv usr vmlinuz.old
root@ofaci1:~# umount /mnt/d1
- Use 4.4.0-119-generic
root@ofaci1:~# uname -a
Linux ofaci1 4.4.0-119-generic #143-Ubuntu SMP Mon Apr 2 16:08:24 UTC 2018
x86_64 x86_64 x86_64 GNU/Linux
root@ofaci1:~# qemu-nbd --connect /dev/nbd1 /opt/ci-pool/slave1.qcow2
root@ofaci1:~# echo $?
0
root@ofaci1:~# fdisk /dev/nbd1
Welcome to fdisk (util-linux 2.27.1).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
Command (m for help): p
Disk /dev/nbd1: 40 GiB, 42949672960 bytes, 83886080 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x000dfd65
Device Boot Start End Sectors Size Id Type
/dev/nbd1p1 2048 3905535 3903488 1.9G 82 Linux swap / Solaris
/dev/nbd1p2 * 3905536 83884031 79978496 38.1G 83 Linux
Command (m for help): q
root@ofaci1:~# mount /dev/nbd1p2 /mnt/d1
mount: special device /dev/nbd1p2 does not exist
root@ofaci1:~# ls /dev/nbd1*
/dev/nbd1 /dev/nbd11 /dev/nbd13 /dev/nbd15
/dev/nbd10 /dev/nbd12 /dev/nbd14
root@ofaci1:~#
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: bot-comment
--
Can't mount kvm image file on new kernel of 16.04(linux 4.4.0-119)
https://bugs.launchpad.net/bugs/1761646
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