user/sven/linux.git/include/linux/drbd.h, branch v3.10.32

drbd: use sched_setscheduler()

2013-03-28T16:10:25Z

It was unnoticed for some time that assigning to current->policy is no longer sufficient to set a real time priority for a kernel thread. Reported-by: Charlie Suffin Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg Signed-off-by: Jens Axboe

drbd: Fix disconnect to keep the peer disk state if connection breaks during operation

2013-03-28T16:10:25Z

The issue was that if the connection broke while we did the gracefull state change to C_DISCONNECTING (C_TEARDOWN), then we returned a success code from the state engine. (SS_CW_NO_NEED) The result of that is that we missed to call the fence-peer script in such a case. Fixed that by introducing a new error code (SS_OUTDATE_WO_CONN). This one should never reach back into user space. Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg Signed-off-by: Jens Axboe

drbd: Broadcast sync progress no more often than once per second

2012-11-09T13:11:43Z

Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg

drbd: disambiguation, s/ERR_DISCARD/ERR_DISCARD_IMPOSSIBLE/

2012-11-09T13:05:50Z

If for some reason (typically "split-brained" cluster manager) drbd replica data has diverged, we can chose a victim, and reconnect using "--discard-my-data", causing the victim to become sync-target, fetching all changed blocks from the peer. If we are Primary, we are potentially in use, and we refuse to "roll back" changes to the data below the page cache and other users. Rename the error symbol for this to ERR_DISCARD_IMPOSSIBLE. Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg

drbd: introduce stop-sector to online verify

2012-11-09T13:05:32Z

We now can schedule only a specific range of sectors for online verify, or interrupt a running verify without interrupting the connection. Had to bump the protocol version differently, we are now 101. Added verify_can_do_stop_sector() { protocol >= 97 && protocol != 100; } Also, the return value convention for worker callbacks has changed, we returned "true/false" for "keep the connection up" in 8.3, we return 0 for success and <= for failure in 8.4. Affected: receive_state() Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg

drbd: New disk option al-updates

2012-11-08T15:58:31Z

By disabling al-updates one might increase performace. The price for that is that in case a crashed primary (that had al-updates disabled) is reintegraded, it will receive a full-resync instead of a bitmap based resync. Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg

drbd: Load balancing method: striping

2012-11-08T15:58:11Z

Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg

drbd: Load balancing of read requests

2012-11-08T15:58:10Z

New config option for the disk secition "read-balancing", with the values: prefer-local, prefer-remote, round-robin, when-congested-remote. Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg

drbd: on attach, enforce clean meta data

2012-11-08T15:57:51Z

Detection of unclean shutdown has moved into user space. The kernel code will, whenever it updates the meta data, mark it as "unclean", and will refuse to attach to such unclean meta data. "drbdadm up" now schedules "drbdmeta apply-al", which will apply the activity log to the bitmap, and/or reinitialize it, if necessary, as well as set a "clean" indicator flag. This moves a bit code out of kernel space. As a side effect, it also prevents some 8.3 module from accidentally ignoring the 8.4 style activity log, if someone should downgrade, whether on purpose, or accidentally because he changed kernel versions without providing an 8.4 for the new kernel, and the new kernel comes with in-tree 8.3. Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg

drbd: Use the terminology suggested by the command names in the source code and messages

2012-11-08T15:57:44Z

Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg