This bug was fixed in the package makedumpfile - 1:1.6.7-1ubuntu2.3
---------------
makedumpfile (1:1.6.7-1ubuntu2.3) focal; urgency=medium
* makedumpfile falls back to cp with the 5.11 kernel (LP: #1942784)
-d/p/0008-PATCH-Retrieve-MAX_PHYSMEM_BITS-from-vmcoreinfo.patch
* makedumpfile doesn't create dmesg file on 5.10+ kernels (LP: #1921403)
-d/p/0009-PATCH-1-2-printk-add-support-for-lockless-ringbuffer.patch
-d/p/0010-PATCH-2-2-printk-use-committed-finalized-state-value.patch
-- Ioanna Alifieraki <ioanna-maria.alifier...@canonical.com> Mon, 18
Oct 2021 16:43:56 +0000
** Changed in: makedumpfile (Ubuntu Focal)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1921403
Title:
makedumpfile does not create dmesg file in /var/crash on 5.10+ kernels
Status in makedumpfile package in Ubuntu:
Fix Released
Status in makedumpfile source package in Focal:
Fix Released
Status in makedumpfile source package in Hirsute:
Fix Released
Status in makedumpfile package in Debian:
Fix Released
Bug description:
[IMPACT]
makedumpfile does not create the dmesg.<timestamp> in /var/crash.
This happens only on 5.10+ kernel because 5.10 kernel introduces a new
lockless ringbuffer.
This issue has been addressed upstream with commits :
[1] c617ec633392([PATCH 1/2] printk: add support for lockless ringbuffer)
[2] 44b073b7ec46([PATCH 2/2] printk: use committed/finalized state values)
[TEST CASE]
For testing a machine running focal with the 5.11 kernel is required.
Then trigger a crash.
After reboot make sure that dmesg.<timestamp> file is created in
/var/crash/<timestamp>
[WHERE PROBLEMS COULD OCCUR]
Any problems would involve the dmesg file not created.
[Other]
[1]
https://github.com/makedumpfile/makedumpfile/commit/c617ec63339222f3a44d73e36677a9acc8954ccd
[2]
https://github.com/makedumpfile/makedumpfile/commit/44b073b7ec467aee0d7de381d455b8ace1199184
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