linux/drivers/block/drbd
Lars Ellenberg 763eb63625 drbd: fix potential spinlock deadlock
drbd_try_clear_on_disk_bm() has a sanity check for the number of blocks
left to be resynced (rs_left) in the current resync extent.
If it detects a mismatch, it complains, and forces a disconnect using
drbd_force_state(mdev, NS(conn, C_DISCONNECTING));

Unfortunately, this may be called while holding the req_lock,
and drbd_force_state() want's to aquire that lock itself. Deadlock.

Don't force a disconnect, but fix up rs_left by recounting and
reassigning the number of dirty blocks in that extent.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
2012-05-09 15:15:58 +02:00
..
drbd_actlog.c drbd: fix potential spinlock deadlock 2012-05-09 15:15:58 +02:00
drbd_bitmap.c drbd: change some GFP_KERNEL to GFP_NOIO 2012-05-09 15:10:47 +02:00
drbd_int.h drbd: send intermediate state change results to the peer 2012-05-09 15:15:56 +02:00
drbd_main.c drbd: send intermediate state change results to the peer 2012-05-09 15:15:56 +02:00
drbd_nl.c drbd: send intermediate state change results to the peer 2012-05-09 15:15:56 +02:00
drbd_proc.c drbd: cosmetic: fix accidental division instead of modulo when pretty printing 2012-05-09 10:01:39 +02:00
drbd_receiver.c drbd: Fixed an obvious copy-n-paste mistake 2012-05-09 15:15:57 +02:00
drbd_req.c drbd: Implemented the disk-timeout option 2012-05-09 15:10:45 +02:00
drbd_req.h drbd: Immediately allow completion of IOs, that wait for IO completions on a failed disk 2012-05-09 10:16:04 +02:00
drbd_strings.c drbd: Rename enum drbd_state_ret_codes to enum drbd_state_rv 2011-03-10 11:36:18 +01:00
drbd_vli.h Fix common misspellings 2011-03-31 11:26:23 -03:00
drbd_worker.c drbd: Fixed an obvious copy-n-paste mistake 2012-05-09 15:15:57 +02:00
drbd_wrappers.h drbd: Get rid of unnecessary macros (2) 2011-03-10 11:36:15 +01:00
Kconfig drbd: Kconfig fix 2009-12-29 17:38:28 +01:00
Makefile drbd: remove tracing bits 2009-10-01 21:17:58 +02:00