** Changed in: linux (Ubuntu Cosmic)
Status: In Progress => Fix Committed
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https://bugs.launchpad.net/bugs/1816425
Title:
Use memblock quirk instead of delayed allocation for GICv3 LPI tables
Status in linux package in Ubuntu:
Fix Committed
Status in linux source package in Cosmic:
Fix Committed
Status in linux source package in Disco:
Fix Committed
Bug description:
[Impact]
The fix for LP: #1806766 has the issue that the persistent memory
reservations for the GICv3 LPI tables may have been allocated an overwritten by
the time we get to reserving them. This can continue to break kdump in certain
conditions.
[Test Case]
sudo apt install linux-crashdump
echo 'GRUB_CMDLINE_LINUX_DEFAULT="$GRUB_CMDLINE_LINUX_DEFAULT
crashkernel=512M"' | \
sudo tee /etc/default/grub.d/kdump-tools.cfg
sudo update-grub
sudo reboot
echo 1 | sudo tee /proc/sys/kernel/sysrq
echo c | sudo tee /proc/sysrq-trigger
[Fix]
582a32e708823 efi/arm: Revert "Defer persistent reservations until after
paging_init()"
8a5b403d71aff arm64, mm, efi: Account for GICv3 LPI tables in static memblock
reserve table
[Regression Risk]
The change in reserved regions only impacts arm64.
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