Public bug reported:
Issue found on a i386 SUT with X-4.15 low-latency kernel:
creating backing nbd image /tmp/nbd_image.img
--------------------------------------------------------------------------------
Image path: /tmp/nbd_image.img
Mount point: /mnt/nbd-test-12309
Date: Tue Jan 29 06:30:51 UTC 2019
Host: pepe
Kernel: 4.15.0-43-lowlatency #46~16.04.1-Ubuntu SMP PREEMPT Fri Dec 7
16:13:34 UTC 2018
Machine: pepe i686 i686
CPUs online: 8
CPUs total: 8
Page size: 4096
Pages avail: 1824175
Pages total: 2069973
Free space:
Filesystem Size Used Avail Use% Mounted on
udev 4.0G 0 4.0G 0% /dev
tmpfs 809M 8.8M 800M 2% /run
/dev/sda1 275G 5.8G 255G 3% /
tmpfs 4.0G 0 4.0G 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 4.0G 0 4.0G 0% /sys/fs/cgroup
tmpfs 809M 0 809M 0% /run/user/1000
--------------------------------------------------------------------------------
NBD device /dev/nbd0 created
found nbd export
NBD exports found:
test
starting client with NBD device /dev/nbd0
Negotiation: ..size = 128MB
creating ext4 on /dev/nbd0
mkfs on /dev/nbd0 succeeded after 0 attempt(s)
checking ext4 on /dev/nbd0
fsck from util-linux 2.27.1
/dev/nbd0: clean, 11/32768 files, 9787/131072 blocks
mount:
/dev/nbd0 on /mnt/nbd-test-12309 type ext4 (rw,relatime,data=ordered)
mounted on /dev/nbd0
free:
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/nbd0 122835 1550 112111 2% /mnt/nbd-test-12309
creating large file /mnt/nbd-test-12309/largefile
-rw-r--r-- 1 root root 100M Jan 29 06:30 /mnt/nbd-test-12309/largefile
free:
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/nbd0 122835 103951 9710 92% /mnt/nbd-test-12309
removing file /mnt/nbd-test-12309/largefile
unmounting /mnt/nbd-test-12309
stopping client
disconnect, sock, done
Found kernel warning, IO error and/or call trace
echo
[ 144.498338] creating backing nbd image /tmp/nbd_image.img
[ 145.668377] NBD device /dev/nbd0 created
[ 145.716876] found nbd export
[ 146.760018] starting client with NBD device /dev/nbd0
[ 146.761655] creating ext4 on /dev/nbd0
[ 147.007051] mkfs on /dev/nbd0 succeeded after 0 attempt(s)
[ 147.171873] checking ext4 on /dev/nbd0
[ 147.222034] EXT4-fs (nbd0): mounted filesystem with ordered data mode.
Opts: (null)
[ 147.226224] mounted on /dev/nbd0
[ 147.227449] creating large file /mnt/nbd-test-12309/largefile
[ 147.940687] removing file /mnt/nbd-test-12309/largefile
[ 148.007125] unmounting /mnt/nbd-test-12309
[ 149.048638] stopping client
[ 149.049176] block nbd0: NBD_DISCONNECT
[ 149.049200] block nbd0: shutting down sockets
[ 149.049320] nbd0: detected capacity change from 0 to 134217728
[ 149.049346] print_req_error: I/O error, dev nbd0, sector 0
[ 149.055116] Buffer I/O error on dev nbd0, logical block 0, async page read
[ 149.062402] print_req_error: I/O error, dev nbd0, sector 0
[ 149.068078] Buffer I/O error on dev nbd0, logical block 0, async page read
[ 149.075363] print_req_error: I/O error, dev nbd0, sector 0
[ 149.080923] Buffer I/O error on dev nbd0, logical block 0, async page read
[ 149.087847] ldm_validate_partition_table(): Disk read failed.
[ 149.087861] print_req_error: I/O error, dev nbd0, sector 0
[ 149.093442] Buffer I/O error on dev nbd0, logical block 0, async page read
[ 149.100409] print_req_error: I/O error, dev nbd0, sector 0
[ 149.105988] Buffer I/O error on dev nbd0, logical block 0, async page read
[ 149.112912] print_req_error: I/O error, dev nbd0, sector 0
[ 149.118544] Buffer I/O error on dev nbd0, logical block 0, async page read
[ 149.125537] print_req_error: I/O error, dev nbd0, sector 0
[ 149.131027] Buffer I/O error on dev nbd0, logical block 0, async page read
[ 149.138007] Dev nbd0: unable to read RDB block 0
[ 149.142647] print_req_error: I/O error, dev nbd0, sector 0
[ 149.148182] Buffer I/O error on dev nbd0, logical block 0, async page read
[ 149.155213] print_req_error: I/O error, dev nbd0, sector 24
[ 149.160837] Buffer I/O error on dev nbd0, logical block 3, async page read
[ 149.167846] print_req_error: I/O error, dev nbd0, sector 0
[ 149.173363] Buffer I/O error on dev nbd0, logical block 0, async page read
[ 149.180357] nbd0: unable to read partition table
[ 149.696627] Found kernel warning, IO error and/or call trace
[ 149.696665] echo
killing server
================================================================================
Completed
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.15.0-43-lowlatency 4.15.0-43.46~16.04.1
ProcVersionSignature: User Name 4.15.0-43.46~16.04.1-lowlatency 4.15.18
Uname: Linux 4.15.0-43-lowlatency i686
ApportVersion: 2.20.1-0ubuntu2.18
Architecture: i386
Date: Tue Jan 29 06:33:16 2019
SourcePackage: linux-hwe
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: ubuntu-kernel-tests
Importance: Undecided
Status: New
** Affects: linux-hwe (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug i386 uec-images xenial
** Also affects: ubuntu-kernel-tests
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1813713
Title:
ubuntu_nbd_smoke_test failed with kernel warning on X-4.15 i386
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