group.of.nepali.translators team mailing list archive

[Mathieu Trudel-Lapierre <mathieu.tl@xxxxxxxxx>]

Public bug reported:

[Impact]
If trying to boot a system with PMEM:

"Unknown memory type 14, considering reserved"

The system will then not have access to EFIPresistentMemory ranges,
because grub could not hand them over to the kernel to use. The
resulting system would be missing a /dev/pmemN device.

Grub requires 4 cherry-picked commits:

    - debian/patches/git_pmem_really_mark_mem_reserved_3d2c8048.patch
    - debian/patches/git_pmem_translate_persistent_type_76ce1de7.patch
    - debian/patches/git_pmem_mmap_handle_pmem_c79c59f1.patch
    - debian/patches/git_pmem_efiemu_handle_pmem_ae3b83a4.patch


[Test case]
- Boot PMEM-enabled system with updated grub

[Regression Potential]
This changes handling of memory ranges in grub, and may lead to incorrectly passing memory to the kernel, or otherwise allowing allocation of memory within reserved ranges. This would typically lead to a failure to boot the kernel, or missing memory-based devices (such a missing /dev/pmem0).

** Affects: grub2 (Ubuntu)
     Importance: Undecided
         Status: Fix Released

** Affects: grub2 (Ubuntu Xenial)
     Importance: Critical
     Assignee: Mathieu Trudel-Lapierre (cyphermox)
         Status: In Progress

** Affects: grub2 (Ubuntu Zesty)
     Importance: High
     Assignee: Mathieu Trudel-Lapierre (cyphermox)
         Status: Triaged

** Affects: grub2 (Ubuntu Artful)
     Importance: Undecided
         Status: Fix Released

** Also affects: grub2 (Ubuntu Artful)
   Importance: Undecided
       Status: New

** Also affects: grub2 (Ubuntu Zesty)
   Importance: Undecided
       Status: New

** Also affects: grub2 (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Changed in: grub2 (Ubuntu Artful)
       Status: New => Fix Released

** Changed in: grub2 (Ubuntu Xenial)
     Assignee: (unassigned) => Mathieu Trudel-Lapierre (cyphermox)

** Changed in: grub2 (Ubuntu Xenial)
   Importance: Undecided => Critical

** Changed in: grub2 (Ubuntu Xenial)
       Status: New => Triaged

** Changed in: grub2 (Ubuntu Zesty)
       Status: New => Triaged

** Changed in: grub2 (Ubuntu Zesty)
   Importance: Undecided => High

** Changed in: grub2 (Ubuntu Zesty)
     Assignee: (unassigned) => Mathieu Trudel-Lapierre (cyphermox)

** Changed in: grub2 (Ubuntu Xenial)
       Status: Triaged => In Progress

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https://bugs.launchpad.net/bugs/1716424

Title:
  correctly parse PMEM memory ranges to pass it to the kernel

Status in grub2 package in Ubuntu:
  Fix Released
Status in grub2 source package in Xenial:
  In Progress
Status in grub2 source package in Zesty:
  Triaged
Status in grub2 source package in Artful:
  Fix Released

Bug description:
  [Impact]
  If trying to boot a system with PMEM:

  "Unknown memory type 14, considering reserved"

  The system will then not have access to EFIPresistentMemory ranges,
  because grub could not hand them over to the kernel to use. The
  resulting system would be missing a /dev/pmemN device.

  Grub requires 4 cherry-picked commits:

      - debian/patches/git_pmem_really_mark_mem_reserved_3d2c8048.patch
      - debian/patches/git_pmem_translate_persistent_type_76ce1de7.patch
      - debian/patches/git_pmem_mmap_handle_pmem_c79c59f1.patch
      - debian/patches/git_pmem_efiemu_handle_pmem_ae3b83a4.patch

  
  [Test case]
  - Boot PMEM-enabled system with updated grub

  [Regression Potential]
  This changes handling of memory ranges in grub, and may lead to incorrectly passing memory to the kernel, or otherwise allowing allocation of memory within reserved ranges. This would typically lead to a failure to boot the kernel, or missing memory-based devices (such a missing /dev/pmem0).

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