Public bug reported:

SRU Justification:

[Impact]

AWS discovered an issue of long EC2 instance launch times on the
upcoming R8g instance types.

[Fix]

They have identified the following fixes that address this issue:

* 
https://patchew.org/linux/[email protected]/[email protected]/
* 
https://patchew.org/linux/[email protected]/[email protected]/

They would like this fixced in the jammy, and noble kernels.


For reference, here are the links to the above patches in 6.10-rc3:

* arm64: mm: Don't remap pgtables per-cont(pte|pmd) block
https://github.com/torvalds/linux/commit/5c63db59c5f89925add57642be4f789d0d671ccd
* arm64: mm: Batch dsb and isb when populating pgtables
https://github.com/torvalds/linux/commit/1fcb7cea8a5f7747e02230f816c2c80b060d9517


[Test Plan]
AWS test.

[Where problems could occur]

[Other info]
SF# 00387444

** Affects: linux-aws (Ubuntu)
     Importance: Undecided
     Assignee: Philip Cox (philcox)
         Status: Fix Released

** Affects: linux-aws (Ubuntu Jammy)
     Importance: Undecided
         Status: New

** Affects: linux-aws (Ubuntu Noble)
     Importance: Undecided
         Status: New

** Also affects: linux-aws (Ubuntu Jammy)
   Importance: Undecided
       Status: New

** Also affects: linux-aws (Ubuntu Noble)
   Importance: Undecided
       Status: New

** Changed in: linux-aws (Ubuntu)
       Status: New => Fix Released

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https://bugs.launchpad.net/bugs/2069352

Title:
  aws: Backport linear memory map change

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