Azure: not enough RAM under 4GB for CVM
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux-azure (Ubuntu) |
Fix Released
|
Undecided
|
Unassigned | ||
Impish |
Fix Released
|
Medium
|
Tim Gardner | ||
Jammy |
Fix Released
|
Undecided
|
Unassigned |
Bug Description
SRU Justification
[Impact]
Can you please include one more patchset for the "no enough RAM under 4GB" issue for the v5.13 kernel (and v5.15 kernel):
https://<email address hidden>/
https://<email address hidden>/
Without the two patches, currently the 5.13 kernel (and 5.15 kernel) can't boot as a CVM guest on Azure. :-(
The background is: currently an Azure host only provides about 900 MB memory below the 4GB boundary while the swiotlb code (which is required by the CVM patchset) needs to allocate memory of a size of MIN(1GB, 6% of the total memory). There will be an Azure host update, with which the host will provide about 3GB memory below the 4GB boundary, but we still need to wait a few more weeks to know the ETA. Currently the above two patches can work around the issue from the guest side.
[Test Case]
Microsoft tested
[Where things could go wrong]
These patches could affect non-CVM instances.
[Other Info]
SF: #00323683
Changed in linux-azure (Ubuntu Jammy): | |
status: | New → Fix Committed |
Changed in linux-azure (Ubuntu Impish): | |
status: | New → In Progress |
importance: | Undecided → Medium |
assignee: | nobody → Tim Gardner (timg-tpi) |
Changed in linux-azure (Ubuntu Impish): | |
status: | In Progress → Fix Committed |
tags: |
added: verification-done-lunar removed: verification-needed-lunar |
https:/ /lists. ubuntu. com/archives/ kernel- team/2022- March/129045. html