3 commits

Author	SHA1	Message	Date
Lars Ellenberg	20c68fdea1	drbd: Enable QUEUE_FLAG_DISCARD only if the peer can recieve P_TRIM ... Allow the user of REQ_DISCARD. 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>	2014-04-30 13:46:55 -06:00
Lars Ellenberg	a0fb3c47a1	drbd: prepare receiving side for REQ_DISCARD ... If the receiver needs to serve a discard request on a queue that does not announce to be discard cabable, it falls back to do synchronous blkdev_issue_zeroout(). We expect only "reasonably" large (up to one activity log extent?) discard requests. We do this to not to not block the receiver for too long in this fallback code path, and to not set/clear too many bits inside one spinlock_irq_save() in drbd_set_in_sync/drbd_set_out_of_sync, 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>	2014-04-30 13:46:55 -06:00
Andreas Gruenbacher	a3603a6e3b	drbd: Split off on-the-wire protocol definitions ... Keep the protocol definitions separate from the kernel code; they are useful in their own right. Signed-off-by: Andreas Gruenbacher <agruen@linbit.com> Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>	2014-02-17 16:27:49 +01:00