*** This bug is a duplicate of bug 2076147 ***
https://bugs.launchpad.net/bugs/2076147
------- Comment From sthou...@in.ibm.com 2024-12-03 01:10 EDT-------
(In reply to comment #13)
> I tried the below scenarios as mentioned by Kautuk, i already updated Kautuk
> regarding this!
>
> Steps for 1st scenario:
> i) Stop stress-ng on the VM.
> ii) Do a "rm /var/run/libvirt.pid" and then restart the libvirtd service.
> iii) Take a snapshot and check how much time it takes.
> Tried this 5-6 times
>
> O/p in this scenario is
>
> date;virsh snapshot-create guest;date
> Mon Oct 21 06:24:10 AM CDT 2024
> Domain snapshot 1729509850 created
> Mon Oct 21 06:46:32 AM CDT 2024
>
>
> Steps for 2nd scenario:
> i) Again do a "rm /var/run/libvirt.pid" and then restart the libvirtd
> service.
> ii) Now run stress-ng on the VM.
> iii) Now again take a snapshot and check how much time it takes.
>
> O/P in this scenario:
>
> date;virsh snapshot-create guest;date
> Mon Oct 21 08:39:12 AM CDT 2024
> Domain snapshot 1729517952 created
> Mon Oct 21 09:30:29 AM CDT 2024
>
we do not see the hanging L2 call-stacks with snapshot tests mentioned
in the original bug hence okay to integrate these patches.
please include this upstream commit in Ubuntu 24.04 commit:
73bc32875ee9b1881dd780308c6793fe463fe803 mm: hold PTL from the first PTE
while reclaiming a large folio
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https://bugs.launchpad.net/bugs/2076569
Title:
ISST-LTE:KOP:doodlp1g3:L2 guest hung and Call traces seen with
Snapshot tests
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