6a9a92f4ef
We have one pre-allocated page to do certain synchronous meta data IO with, using it is serialized like so: drbd_md_get_buffer(); drbd_md_sync_page_io(); drbd_md_sync_page_io(); ... drbd_md_put_buffer(); In drbd_md_sync_page_io() there is an ASSERT(atomic_read(&mdev->md_io_in_use) == 1); We want to be able to timeout on unresponsive lower level devices, so we can "detach" in that case. Inside drbd_md_sync_page_io() we grab an extra reference, to not have a dangling pointer in case a delayed IO eventually does still complete, even after we "detached" already. We need to put the extra reference before we signal completion from the completion handler, or the second drbd_md_sync_page_io() above may trigger the assert (reference count still 2). Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com> |
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| .. | ||
| drbd_actlog.c | ||
| drbd_bitmap.c | ||
| drbd_int.h | ||
| drbd_main.c | ||
| drbd_nl.c | ||
| drbd_proc.c | ||
| drbd_receiver.c | ||
| drbd_req.c | ||
| drbd_req.h | ||
| drbd_strings.c | ||
| drbd_vli.h | ||
| drbd_worker.c | ||
| drbd_wrappers.h | ||
| Kconfig | ||
| Makefile | ||