4.4.0-47-generic dm_snapshot random deadlock
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Triaged
|
High
|
Unassigned | ||
Xenial |
Triaged
|
High
|
Unassigned |
Bug Description
Server's load become high with tasks in D state, no choice but to reboot the system.
Could be related to the following ? :
https:/
https:/
https:/
https:/
ii xen-hypervisor-
ii linux-image-
ii linux-image-
kernel messages:
----------------
[890070.994700] INFO: task blkback.
[890070.994758] Not tainted 4.4.0-47-generic #68~14.04.1-Ubuntu
[890070.994806] "echo 0 > /proc/sys/
[890070.994884] blkback.3.xvda2 D ffff8800b7ff3928 0 5756 2 0x00000000
[890070.994890] ffff8800b7ff3928 ffffffff81e13500 ffff8800b6a4be80 ffff8800b7ff4000
[890070.994895] ffff88013a83cc18 ffff88013a83cc00 ffffffff00000000 fffffffe00000001
[890070.994898] ffff8800b7ff3940 ffffffff817fafc5 ffff8800b6a4be80 ffff8800b7ff39c0
[890070.994902] Call Trace:
[890070.994912] [<ffffffff817fa
[890070.994917] [<ffffffff817fd
[890070.994923] [<ffffffff81689
[890070.994927] [<ffffffff81689
[890070.994931] [<ffffffff813e6
[890070.994933] [<ffffffff817fc
[890070.994939] [<ffffffffc0314
[890070.994944] [<ffffffff81185
[890070.994946] [<ffffffff81185
[890070.994949] [<ffffffffc0314
[890070.994952] [<ffffffffc0315
[890070.994955] [<ffffffff8167f
[890070.994957] [<ffffffff81680
[890070.994960] [<ffffffff81680
[890070.994964] [<ffffffff813aa
[890070.994968] [<ffffffff813aa
[890070.994971] [<ffffffff813a1
[890070.994977] [<ffffffffc02c6
[890070.994981] [<ffffffff8101c
[890070.994985] [<ffffffffc02c7
[890070.994990] [<ffffffff810e5
[890070.994993] [<ffffffff817fd
[890070.994997] [<ffffffffc02c7
[890070.995002] [<ffffffff810a4
[890070.995004] [<ffffffff817fa
[890070.995010] [<ffffffff810bd
[890070.995014] [<ffffffffc02c7
[890070.995018] [<ffffffff8109b
[890070.995021] [<ffffffff8109b
[890070.995025] [<ffffffff817fe
[890070.995027] [<ffffffff8109b
CVE References
affects: | linux-lts-xenial (Ubuntu) → linux (Ubuntu) |
Changed in linux (Ubuntu): | |
importance: | Undecided → Medium |
status: | New → Triaged |
importance: | Medium → High |
Changed in linux (Ubuntu Xenial): | |
status: | New → Triaged |
importance: | Undecided → High |
tags: | added: kernel-da-key xenial |
this regression can be reproduced:
- with 15 VPS
- under heavy I/O
- with repeated snapshot / fsck / data read
the system locks up in about 3 hours
full stack trace attached, please consider this a serious regression
most likely this upstream bug : https:/ /bugzilla. kernel. org/show_ bug.cgi? id=119841