Ubuntu 24.10 (Oracular Oriole) has reached end of life, so this bug will
not be fixed for that specific release.
** Changed in: linux (Ubuntu Oracular)
Status: Confirmed => Won't Fix
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/2109543
Title:
deadlock on cpu_hotplug_lock in __accept_page()
Status in linux package in Ubuntu:
New
Status in linux-intel package in Ubuntu:
New
Status in linux source package in Oracular:
Won't Fix
Status in linux-intel source package in Oracular:
Won't Fix
Status in linux source package in Plucky:
Confirmed
Status in linux-intel source package in Plucky:
Fix Committed
Bug description:
[ Impact ]
* Boot hangs because of deadlock caused by mm (memory management)
during CPU bring-up.
[ Fix ]
* Upstream commit :
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4067196a52278156d18d8d6fa7f43970611b1b49
[ Test Plan ]
* This deadlock has been uncovered in the context of confidential VMs work
(AMD SNP & TDX)
since its appearance frequency has been increased by the introduction of
another commit
for fixing an unrelated issue when booting a large memory profile TDX VM.
(https://lore.kernel.org/all/[email protected]/#t)
Per consequence, to have a better chance to reproduce the issue, run a AMD
SNP or TDX VM
with a certain CPU configuration:
For AMD SNP, you can follow the instructions in the submission
https://lore.kernel.org/all/[email protected]/#t
For Intel TDX, we can also reproduce this issue with Intel TDX VM with our
6.14 -intel kernel that has
TDX feature enabled (since TDX feature is only in kernel main-next for now
and not yet released).
[ Where problems could occur ]
* Problems could occur during system boot and CPU bring up
[ Further information ]
* It is necessary to backport this patch to Plucky and Oracular kernel since
the commit that exhibits this deadlock is in Plucky 6.14 and being
backported
to Oracular 6.11 kernel (currently the patch lives in master-next as of
today Apr 29th).
(https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2109530)
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2109543/+subscriptions
--
Mailing list: https://launchpad.net/~kernel-packages
Post to : [email protected]
Unsubscribe : https://launchpad.net/~kernel-packages
More help : https://help.launchpad.net/ListHelp
