[Bug 1830731] Re: [19.10 FEAT] Thin provisioning base support (kernel+390tools)

[Dimitri John Ledkov]

Ubuntu enables discard by default in all the installers, all
filesystems, and all layers (e.g. mdadm/lvm/luks discard).

Assumption until now, has been that it is harmless, when underlying
storage doesn't support discard and always non-harmful when it is
supported.

I agree, we should revert discard support for ESE volumes in Ubuntu for
now.

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Title:
  [19.10 FEAT] Thin provisioning base support (kernel+390tools)

Status in Ubuntu on IBM z Systems:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released
Status in s390-tools package in Ubuntu:
  Fix Released

Bug description:
  Enable use of thin provisioned ECKD volumes.
  Efficient use of storage resources and reduced deployment time for ECKD volumes .

  Tentative Target is kernel 5.3 + s390tools
  Assumption from crystal balls
  merge window closes on Sunday, 2019-07-28 and release on Sunday, 2019-09-15

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