I have set this bug as "not a duplicate", in order to track the request
to have the fix backported to the 4.4 kernels (Xenial and Trusty-hwe ).
** This bug is no longer a duplicate of bug 1840076
Disco update: upstream stable patchset 2019-08-13
** Also affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Disco)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Xenial)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Bionic)
Status: New => Fix Released
** Changed in: linux (Ubuntu Disco)
Status: New => Fix Released
** Also affects: linux (Ubuntu Eoan)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Eoan)
Status: New => Fix Released
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https://bugs.launchpad.net/bugs/1845033
Title:
xenbus: Avoid deadlock during suspend due to open transactions
Status in linux package in Ubuntu:
Confirmed
Status in linux source package in Xenial:
New
Status in linux source package in Bionic:
Fix Released
Status in linux source package in Disco:
Fix Released
Status in linux source package in Eoan:
Fix Released
Bug description:
[Impact]
Xen guests may hang during resume after a migration or suspend.
[Test Case]
Create a Xen guest and run this script and then suspending the VM:
import pyxs, time
c = pyxs.client.Client(xen_bus_path="/dev/xen/xenbus")
c.connect()
c.transaction()
time.sleep(3600)
[Fix]
The following upstream commit fixes the issue:
"xenbus: Avoid deadlock during suspend due to open transactions"
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d10e0cc113c9e1b64b5c6e3db37b5c839794f3df
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