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| author | Lars Ellenberg <lars.ellenberg@linbit.com> | 2010-12-17 21:14:23 +0100 |
|---|---|---|
| committer | Philipp Reisner <philipp.reisner@linbit.com> | 2011-03-10 11:43:35 +0100 |
| commit | 5a22db8968a69bec835d1ed9a96ab3381719e0c0 (patch) | |
| tree | 6dd29c3cec008a2f846f54a02cdb139c4ce94be3 /drivers/block/drbd/drbd_int.h | |
| parent | f735e3635430c6d1c319664d82b34376e3f9aa17 (diff) | |
| download | kernel_samsung_smdk4412-5a22db8968a69bec835d1ed9a96ab3381719e0c0.tar.gz kernel_samsung_smdk4412-5a22db8968a69bec835d1ed9a96ab3381719e0c0.tar.bz2 kernel_samsung_smdk4412-5a22db8968a69bec835d1ed9a96ab3381719e0c0.zip | |
drbd: serialize sending of resync uuid with pending w_send_oos
To improve the latency of IO requests during bitmap exchange,
we recently allowed writes while waiting for the bitmap, sending "set
out-of-sync" information packets for any newly dirtied bits.
We have to make sure that the new resync-uuid does not overtake
these "set oos" packets. Once the resync-uuid is received, the
sync target starts the resync process, and expects the bitmap to
only be cleared, not re-set.
If we use this protocol extension, we queue the generation and sending
of the resync-uuid on the worker, which naturally serializes with all
previously queued packets.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Diffstat (limited to 'drivers/block/drbd/drbd_int.h')
| -rw-r--r-- | drivers/block/drbd/drbd_int.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h index 5a2d0ec72b3..ec06e744be4 100644 --- a/drivers/block/drbd/drbd_int.h +++ b/drivers/block/drbd/drbd_int.h @@ -1204,7 +1204,7 @@ extern int drbd_send(struct drbd_conf *mdev, struct socket *sock, extern int drbd_send_protocol(struct drbd_conf *mdev); extern int drbd_send_uuids(struct drbd_conf *mdev); extern int drbd_send_uuids_skip_initial_sync(struct drbd_conf *mdev); -extern int drbd_send_sync_uuid(struct drbd_conf *mdev, u64 val); +extern int drbd_gen_and_send_sync_uuid(struct drbd_conf *mdev); extern int drbd_send_sizes(struct drbd_conf *mdev, int trigger_reply, enum dds_flags flags); extern int _drbd_send_state(struct drbd_conf *mdev); extern int drbd_send_state(struct drbd_conf *mdev); |