** Description changed: 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/20240412131908.433043-1-ryan.robe...@arm.com/20240412131908.433043-2-ryan.robe...@arm.com/ * https://patchew.org/linux/20240412131908.433043-1-ryan.robe...@arm.com/20240412131908.433043-3-ryan.robe...@arm.com/ 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 + AWS has requested only the first two patches of the series of three patches be back ported. + [Test Plan] - AWS test. + I have tested this, as has AWS. [Where problems could occur] + With the reordering of tlb invalidation and memory barriers, there is some risk, but this chance for regressions on this change is fairly small as the scope is fairly narrow. [Other info] SF# 00387444
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2069352 Title: aws: Backport linear memory map change To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-aws/+bug/2069352/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
