drbd: Allow drbd_epoch_entries to use multiple bios.
This should allow for better performance if the lower level IO stack
of the peers differs in limits exposed either via the queue,
or via some merge_bvec_fn.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index 3aa0add..d0fabac 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -2354,6 +2354,19 @@
return 1;
}
+static int _drbd_send_zc_ee(struct drbd_conf *mdev, struct drbd_epoch_entry *e)
+{
+ struct page *page = e->pages;
+ unsigned len = e->size;
+ page_chain_for_each(page) {
+ unsigned l = min_t(unsigned, len, PAGE_SIZE);
+ if (!_drbd_send_page(mdev, page, 0, l))
+ return 0;
+ len -= l;
+ }
+ return 1;
+}
+
static void consider_delay_probes(struct drbd_conf *mdev)
{
if (mdev->state.conn != C_SYNC_SOURCE || mdev->agreed_pro_version < 93)
@@ -2430,7 +2443,7 @@
drbd_send(mdev, mdev->data.socket, &p, sizeof(p), MSG_MORE));
if (ok && dgs) {
dgb = mdev->int_dig_out;
- drbd_csum(mdev, mdev->integrity_w_tfm, req->master_bio, dgb);
+ drbd_csum_bio(mdev, mdev->integrity_w_tfm, req->master_bio, dgb);
ok = drbd_send(mdev, mdev->data.socket, dgb, dgs, MSG_MORE);
}
if (ok) {
@@ -2483,11 +2496,11 @@
sizeof(p), MSG_MORE);
if (ok && dgs) {
dgb = mdev->int_dig_out;
- drbd_csum(mdev, mdev->integrity_w_tfm, e->private_bio, dgb);
+ drbd_csum_ee(mdev, mdev->integrity_w_tfm, e, dgb);
ok = drbd_send(mdev, mdev->data.socket, dgb, dgs, MSG_MORE);
}
if (ok)
- ok = _drbd_send_zc_bio(mdev, e->private_bio);
+ ok = _drbd_send_zc_ee(mdev, e);
drbd_put_data_sock(mdev);