This proved not to be the case; in fact, the issue was caused by a
change in kernel that changed a bit and hence, the vmcore collection
failed.
The culprit was kernel commit 326e1b8f83a4 ("mm/sparsemem: introduce a
SECTION_IS_EARLY flag"), introduced in kernel 5.3.
The makedumpfile fix for this comes in commit 7bdb468c2c ("Increase
SECTION_MAP_LAST_BIT to 4").
The PPA launchpad.net/~gpiccoli/+archive/ubuntu/lp1857616 contains a build with
this fix for testing purposes.
Cheers,
Guilherme
** Also affects: makedumpfile (Ubuntu Xenial)
Importance: Undecided
Status: New
** Also affects: makedumpfile (Ubuntu Bionic)
Importance: Undecided
Status: New
** Also affects: makedumpfile (Ubuntu Disco)
Importance: Undecided
Status: New
** Also affects: makedumpfile (Ubuntu Focal)
Importance: High
Assignee: Guilherme G. Piccoli (gpiccoli)
Status: Confirmed
** Also affects: makedumpfile (Ubuntu Eoan)
Importance: Undecided
Status: New
** Changed in: makedumpfile (Ubuntu Xenial)
Status: New => Invalid
** Changed in: makedumpfile (Ubuntu Bionic)
Status: New => Confirmed
** Changed in: makedumpfile (Ubuntu Disco)
Status: New => Invalid
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https://bugs.launchpad.net/bugs/1857616
Title:
Cannot collect dump due to "Can't get a valid pmd_pte" error
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