drbd: change bitmap write-out when leaving resync states
When leaving resync states because of disconnect,
do the bitmap write-out synchronously in the drbd_disconnected() path.
When leaving resync states because we go back to AHEAD/BEHIND, or
because resync actually finished, or some disk was lost during resync,
trigger the write-out from after_state_ch().
The bitmap write-out for resync -> ahead/behind was missing completely before.
Note that this is all only an optimization to avoid double-resyncs of
already completed blocks in case this node crashes.
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>
diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c
index 1ee0023..dcadea2 100644
--- a/drivers/block/drbd/drbd_receiver.c
+++ b/drivers/block/drbd/drbd_receiver.c
@@ -4795,9 +4795,11 @@
drbd_md_sync(device);
- /* serialize with bitmap writeout triggered by the state change,
- * if any. */
- wait_event(device->misc_wait, !test_bit(BITMAP_IO, &device->flags));
+ if (get_ldev(device)) {
+ drbd_bitmap_io(device, &drbd_bm_write_copy_pages,
+ "write from disconnected", BM_LOCKED_CHANGE_ALLOWED);
+ put_ldev(device);
+ }
/* tcp_close and release of sendpage pages can be deferred. I don't
* want to use SO_LINGER, because apparently it can be deferred for