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** Changed in: linux (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1809879
Title:
9f03740a956d7ac6a1b8f8c455da6fa5cae11c22 in ubuntu_btrfs_kernel_fixes
hang with T
Status in ubuntu-kernel-tests:
New
Status in linux package in Ubuntu:
Confirmed
Bug description:
Patch 9f03740a956d7ac6a1b8f8c455da6fa5cae11c22 does not exist in
Trusty kernel tree.
When running this test, it will hang with Trusty and gets killed by
the timeout setting (2h), this will cause the following test failed
with /dev/loop0 mounted issue:
Invoking test 9f03740a956d7ac6a1b8f8c455da6fa5cae11c22
fix 9f03740a956d7ac6a1b8f8c455da6fa5cae11c22
Btrfs: fix infinite path build loops in incremental send
The send operation processes inodes by their ascending number, and
assumes
that any rename/move operation can be successfully performed (sent to the
caller) once all previous inodes (those with a smaller inode number than
the
one we're currently processing) were processed.
[ .... ]
Even without this loop, the incremental send couldn't succeed, because
it would attempt
to send a rename/move operation for the lower inode before the highest
inode number was
renamed/move. This issue is easy to trigger with the following steps:
$ mkfs.btrfs -f /dev/sdb3
$ mount /dev/sdb3 /mnt/btrfs
$ mkdir -p /mnt/btrfs/a/b/c/d
$ mkdir /mnt/btrfs/a/b/c2
$ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1
$ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2
$ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc
$ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2
$ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 >
/tmp/incremental.send
Create a readonly snapshot of
'/tmp/mnt-9f03740a956d7ac6a1b8f8c455da6fa5cae11c22/btrfs' in
'/tmp/mnt-9f03740a956d7ac6a1b8f8c455da6fa5cae11c22/btrfs/snap1'
Create a readonly snapshot of
'/tmp/mnt-9f03740a956d7ac6a1b8f8c455da6fa5cae11c22/btrfs' in
'/tmp/mnt-9f03740a956d7ac6a1b8f8c455da6fa5cae11c22/btrfs/snap2'
At subvol /tmp/mnt-9f03740a956d7ac6a1b8f8c455da6fa5cae11c22/btrfs/snap2
Timer expired (7200 sec.), nuking pid 27517
ERROR
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-164-generic 3.13.0-164.214
ProcVersionSignature: User Name 3.13.0-164.214-generic 3.13.11-ckt39
Uname: Linux 3.13.0-164-generic x86_64
AlsaDevices:
total 0
crw-rw---- 1 root audio 116, 1 Dec 27 08:26 seq
crw-rw---- 1 root audio 116, 33 Dec 27 08:26 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.14.1-0ubuntu3.29
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq',
'/dev/snd/timer'] failed with exit code 1:
Date: Thu Dec 27 09:21:07 2018
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
Lsusb: Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
MachineType: QEMU Standard PC (i440FX + PIIX, 1996)
PciMultimedia:
ProcFB: 0 cirrusdrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-164-generic
root=UUID=576666e8-9e7f-40ee-934e-f1dce18323e5 ro console=ttyS0,115200n8
RelatedPackageVersions:
linux-restricted-modules-3.13.0-164-generic N/A
linux-backports-modules-3.13.0-164-generic N/A
linux-firmware 1.127.24
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/01/2014
dmi.bios.vendor: SeaBIOS
dmi.bios.version: Ubuntu-1.8.2-1ubuntu1
dmi.chassis.type: 1
dmi.chassis.vendor: QEMU
dmi.chassis.version: pc-i440fx-xenial
dmi.modalias:
dmi:bvnSeaBIOS:bvrUbuntu-1.8.2-1ubuntu1:bd04/01/2014:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-xenial:cvnQEMU:ct1:cvrpc-i440fx-xenial:
dmi.product.name: Standard PC (i440FX + PIIX, 1996)
dmi.product.version: pc-i440fx-xenial
dmi.sys.vendor: QEMU
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