tree e8bcf9de1ec9ec9b51f2863c3e1ab9a7286d33ef
parent 700ca8c04a0f4402f379055eec97351e0d6c0087
author Philipp Reisner <philipp.reisner@linbit.com> 1465856774 +0200
committer Jens Axboe <axboe@fb.com> 1465875784 -0600

drbd: Introduce new disk config option rs-discard-granularity

As long as the value is 0 the feature is disabled. With setting
it to a positive value, DRBD limits and aligns its resync requests
to the rs-discard-granularity setting. If the sync source detects
all zeros in such a block, the resync target discards the range
on disk.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <axboe@fb.com>