[focal:linux-azure][PATCH 0/1] LP:#1891931 - [linux-azure] Panic when triggering hibernation

[Marcelo Henrique Cerri]

BugLink: https://bugs.launchpad.net/bugs/1891931

As bug description. We included an additional patch that wasn't
necessary because the base feature is not present in our 5.4
kernel. The unnecessary patch causes a panic when triggering
hibernation in some azure instances.

I managed to reproduce the panic following the steps from in E and D
instances types:

https://bugs.launchpad.net/ubuntu/+source/linux-azure/+bug/1880032/comments/14

Reverting the commit solves the issue. I also tested hibernation on
intances under high memory utilization and the intances entered
hibernation without issues with up to 70% of memory utilization. I
tested that with stress-ng (ie, stress-ng --vm 8 --vm-bytes 50% -t 1d).

---
Marcelo Henrique Cerri (1):
  Revert "video: hyperv_fb: Fix hibernation for the deferred IO feature"

 drivers/video/fbdev/hyperv_fb.c | 2 --
 1 file changed, 2 deletions(-)

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2.25.1