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s390/dasd: Add discard support for ESE volumes
authorJan Höppner <hoeppner@linux.ibm.com>
Fri, 27 Apr 2018 14:57:44 +0000 (16:57 +0200)
committerVasily Gorbik <gor@linux.ibm.com>
Thu, 11 Jul 2019 18:39:54 +0000 (20:39 +0200)
commit7e64db1597fe114b83fe17d0ba96c6aa5fca419a
treec6d4b47f6a4f4972f53b59b1370a71eaa51d5210tree | snapshot
parentb54441534e9648f8df24b75a63bb00ed3aa123decommit | diff
s390/dasd: Add discard support for ESE volumes

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>
drivers/s390/block/dasd_eckd.c diff | blob | history
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