BMC/Intel-BMC/linux.git/drivers/block/drbd/drbd_main.c, branch dev-4.7

drbd: switch to using blk_queue_write_cache()

2016-04-12T22:00:39+00:00

Signed-off-by: Jens Axboe Reviewed-by: Christoph Hellwig

drbd: Use shash and ahash

2016-01-27T12:36:08+00:00

This patch replaces uses of the long obsolete hash interface with either shash (for non-SG users) or ahash. Signed-off-by: Herbert Xu

drbd: don't block forever in disconnect during resync if fencing=r-a-stonith

2015-11-25T16:22:02+00:00

Disconnect should wait for pending bitmap IO. But if that bitmap IO is not happening, because it is waiting for pending application IO, and there is no progress, because the fencing policy suspended application IO because of the disconnect, then we deadlock. The bitmap writeout in this case does not care for concurrent application IO, so there is no point waiting for it. Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg Signed-off-by: Jens Axboe

drbd: make drbd known to lsblk: use bd_link_disk_holder

2015-11-25T16:22:02+00:00

lsblk should be able to pick up stacking device driver relations involving DRBD conveniently. Even though upstream kernel since 2011 says "DON'T USE THIS UNLESS YOU'RE ALREADY USING IT." a new user has been added since (bcache), which sets the precedences for us to use it as well. Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg Signed-off-by: Jens Axboe

drbd: fix spurious alert level printk

2015-11-25T16:22:02+00:00

When accessing out meta data area on disk, we double check the plausibility of the requested sector offsets, and are very noisy about it if they look suspicious. During initial read of our "superblock", for "external" meta data, this triggered because the range estimate returned by drbd_md_last_sector() was still wrong. Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg Signed-off-by: Jens Axboe

drbd: use resource name in workqueue

2015-11-25T16:22:02+00:00

Since kernel 3.3, we can use snprintf-style arguments to create a workqueue. Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg Signed-off-by: Jens Axboe

drbd: Create a dedicated workqueue for sending acks on the control connection

2015-11-25T16:22:01+00:00

The intention is to reduce CPU utilization. Recent measurements unveiled that the current performance bottleneck is CPU utilization on the receiving node. The asender thread became CPU limited. One of the main points is to eliminate the idr_for_each_entry() loop from the sending acks code path. One exception in that is sending back ping_acks. These stay in the ack-receiver thread. Otherwise the logic becomes too complicated for no added value. Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg Signed-off-by: Jens Axboe

drbd: Rename asender to ack_receiver

2015-11-25T16:22:01+00:00

This prepares the next patch where the sending on the meta (or control) socket is moved to a dedicated workqueue. Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg Signed-off-by: Jens Axboe

drbd: Fix locking across all resources

2015-11-25T16:22:00+00:00

Instead of using a rwlock for synchronizing state changes across resources, take the request locks of all resources for global state changes. Use resources_mutex to serialize global state changes. This means that taking the request lock of a resource is now enough to prevent changes of that resource. (Previously, a read lock on the global state lock was needed as well.) Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg Signed-off-by: Jens Axboe

drbd: Move enum write_ordering_e to drbd.h

2015-11-25T16:22:00+00:00

Also change the enum values to all-capital letters. Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg Signed-off-by: Jens Axboe