s390/dasd: Add discard support for ESE volumes

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ESE (Extent Space Efficient) volumes are thin-provisioned and therefore
space is only occupied with real data. In order to make previously used
space available for re-allocation again, discard support is enabled for
ESE volumes allowing the DASD driver to release said space.

Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
Reviewed-by: Stefan Haberland <sth@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

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Jan Höppner 2018-04-27 16:57:44 +02:00 • committed by Vasily Gorbik

parent b54441534e

commit 7e64db1597

1 changed files with 54 additions and 3 deletions

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drivers/s390/block/dasd_eckd.c

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