Hello bugproxy, or anyone else affected,

Accepted makedumpfile into disco-proposed. The package will build now
and be available at
https://launchpad.net/ubuntu/+source/makedumpfile/1:1.6.5-1ubuntu1.1 in
a few hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.  Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested and change the tag from
verification-needed-disco to verification-done-disco. If it does not fix
the bug for you, please add a comment stating that, and change the tag
to verification-failed-disco. In either case, without details of your
testing we will not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance for helping!

N.B. The updated package will be released to -updates after the bug(s)
fixed by this package have been verified and the package has been in
-proposed for a minimum of 7 days.

** Changed in: makedumpfile (Ubuntu Disco)
       Status: In Progress => Fix Committed

** Tags added: verification-needed verification-needed-disco

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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to makedumpfile in Ubuntu.
https://bugs.launchpad.net/bugs/1681909

Title:
  kdump is not captured in remote host when kdump over ssh is configured

Status in The Ubuntu-power-systems project:
  In Progress
Status in makedumpfile package in Ubuntu:
  Fix Released
Status in makedumpfile source package in Xenial:
  Won't Fix
Status in makedumpfile source package in Bionic:
  Fix Committed
Status in makedumpfile source package in Cosmic:
  Won't Fix
Status in makedumpfile source package in Disco:
  Fix Committed
Status in makedumpfile source package in Eoan:
  Fix Released

Bug description:
  [Impact]

  * Kdump over network (like NFS mount or SSH dump) relies on network-
  online target from systemd. Even so, there are some NICs that report
  "Link Up" state but aren't ready to transmit packets. This is a
  generally bad behavior that is credited probably to NIC firmware
  delays, usually not fixable from drivers. Some adapters known to act
  like this are bnx2x, tg3 and ixgbe.

  * Kdump is a mechanism that may be a last resort to debug complex/hard
  to reproduce issues, so it's interesting to increase its reliability /
  resilience. We then propose here a solution/quirk to this issue on
  network dump by adding a retry/delay mechanism; if it's a network
  dump, kdump will retry some times and sleep between the attempts in
  order to exclude the case of NICs that aren't ready yet but will soon
  be able to transmit packets.

  * Although first reported by IBM in PowerPC arch, the scope for this
  issue is the NIC, and it was later reported in x86 arch too.

  [Test case]

  Usually it's difficult to naturally reproduce this issue in a deterministic 
way, but we have an artificial test case on comment #24 of this LP.
  Also, we have a report from this bug in which the user managed to reproduce 
the problem consistently - it's fixed after testing our solution.

  [Regression potential]

  There's not a clear regression potential here since it's just a retry/delay 
mechanism. Some potential problems may come from bad coding in the script.
  The delay between attempts is only 3 sec per iteration, so it shouldn't block 
the kdump progress for a high amount of time at once.

  [Other information]

  Salsa Debian commit:
  
https://salsa.debian.org/debian/makedumpfile/commit/d63ba95337988be1eac8c8c76d90825ff5c6d17f

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