6363 Add UNMAP/TRIM functionality to ZFS and Illumos

Review Request #263 - Created Oct. 20, 2015 and updated

Information
Saso Kiselkov
illumos-gate
Reviewers
openzfs
csiden

Adds support for issuing abstract DKIOCFREE ioctls from ZFS and adds support for translating these ioctls into SCSI UNMAP commands to sd.
This is an upstream of work by Nexenta.

Run on assortment of raidz, mirrors and straight vdevs.

Issues

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Description From Last Updated
Saso Kiselkov
Saso Kiselkov
Steven Hartland
Tim Chase
Saso Kiselkov
Saso Kiselkov
Robert Mustacchi
Robert Mustacchi
Matthew Ahrens
Toomas Soome
Toomas Soome
Saso Kiselkov
Toomas Soome
Robert Mustacchi
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