drbd: only wakeup if something changed in update_peer_seq
authorLars Ellenberg <lars.ellenberg@linbit.com>
Wed, 23 Feb 2011 15:10:01 +0000 (16:10 +0100)
committerPhilipp Reisner <philipp.reisner@linbit.com>
Fri, 14 Oct 2011 14:48:04 +0000 (16:48 +0200)
commit3c13b680ce210313c6f7ad163435b62979958c09
tree16b2cf96f885d1b478980afd4544fabf60323d28
parenta5df0e199cf6b31400fa86f6c3f73fa6e127e9ed
drbd: only wakeup if something changed in update_peer_seq

This commit got it wrong:
    drbd: Make the peer_seq updating code more obvious

    Make it more clear that update_peer_seq() is supposed to wake up the
    seq_wait queue whenever the sequence number changes.

We don't need to wake up everytime we receive a sequence number
that is _different_ from our currently stored "newest" sequence number,
but only if we receive a sequence number _newer_ than what we already
have, when we actually change mdev->peer_seq.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
drivers/block/drbd/drbd_receiver.c