cinder/releasenotes/notes/demc-trim-bb2165f74a5703a6....

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---
features:
- |
Dell EMC PowerStore driver: Report trimming/discard support to Nova and
Cinder.
- |
Dell EMC PowerMax driver: Report trimming/discard support to Nova and
Cinder.
- |
Dell EMC PowerFlex driver: Report trimming/discard support to Nova and
Cinder on thin volumes that don't have snapshots. Not doing trim on
volumes with snapshots is the vendor's recommendation, but can be overriden
with the ``report_discard_supported`` configuration option.