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[Bug 1750021] Re: fails to dump with latest kpti fixes

 

Linux needs commit a0b1280368d1e91ab72f849ef095b4f07a39bbf1 ("kdump:
write correct address of mem_section into vmcoreinfo").

** Changed in: makedumpfile (Ubuntu)
       Status: New => In Progress

** Changed in: makedumpfile (Ubuntu)
     Assignee: (unassigned) => Thadeu Lima de Souza Cascardo (cascardo)

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

** Changed in: linux (Ubuntu)
     Assignee: (unassigned) => Thadeu Lima de Souza Cascardo (cascardo)

** Changed in: linux (Ubuntu)
       Status: New => Confirmed

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

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

** Also affects: linux (Ubuntu Bionic)
   Importance: Undecided
     Assignee: Thadeu Lima de Souza Cascardo (cascardo)
       Status: Confirmed

** Also affects: makedumpfile (Ubuntu Bionic)
   Importance: Undecided
     Assignee: Thadeu Lima de Souza Cascardo (cascardo)
       Status: In Progress

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

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

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https://bugs.launchpad.net/bugs/1750021

Title:
  fails to dump with latest kpti fixes

Status in linux package in Ubuntu:
  Confirmed
Status in makedumpfile package in Ubuntu:
  In Progress
Status in linux source package in Xenial:
  New
Status in makedumpfile source package in Xenial:
  New
Status in linux source package in Artful:
  New
Status in makedumpfile source package in Artful:
  New
Status in linux source package in Bionic:
  Confirmed
Status in makedumpfile source package in Bionic:
  In Progress

Bug description:
  When commit 83e3c48729d9ebb7af5a31a504f3fd6aff0348c4 ("mm/sparsemem:
  Allocate mem_section at runtime for CONFIG_SPARSEMEM_EXTREME=y") was
  backported, it broke the exporting of mem_section on vmcoreinfo.

  makedumpfile will fail to dump in that case. Backporting a kernel fix
  will make it work again, but that means that some kernel versions
  won't be dumpable. A solution for makedumpfile should be done as well.

  Cascardo.

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