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668700b40a
linux/drivers/block/drbd
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Philipp Reisner 668700b40a drbd: Create a dedicated workqueue for sending acks on the control connection 
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 <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
2015-11-25 09:22:01 -07:00
..
drbd_actlog.c block: add a bi_error field to struct bio 2015-07-29 08:55:15 -06:00
drbd_bitmap.c Merge branch 'akpm' (patches from Andrew) 2015-11-07 14:32:45 -08:00
drbd_debugfs.c make simple_positive() public 2015-06-23 18:02:01 -04:00
drbd_debugfs.h drbd: debugfs: add basic hierarchy 2014-07-10 18:35:16 +02:00
drbd_int.h drbd: Create a dedicated workqueue for sending acks on the control connection 2015-11-25 09:22:01 -07:00
drbd_interval.c drbd: use RB_DECLARE_CALLBACKS() to define augment callbacks 2014-09-18 09:00:17 -06:00
drbd_interval.h drbd: application writes may set-in-sync in protocol != C 2014-07-10 18:35:02 +02:00
drbd_main.c drbd: Create a dedicated workqueue for sending acks on the control connection 2015-11-25 09:22:01 -07:00
drbd_nl.c drbd: Create a dedicated workqueue for sending acks on the control connection 2015-11-25 09:22:01 -07:00
drbd_nla.c drbd: Remove drbd_wrappers.h 2014-04-30 13:46:54 -06:00
drbd_nla.h drbd: Split off netlink mandatory attribute handling into separate file 2012-11-08 16:57:45 +01:00
drbd_proc.c drbd: Move enum write_ordering_e to drbd.h 2015-11-25 09:22:00 -07:00
drbd_protocol.h drbd: Create a dedicated workqueue for sending acks on the control connection 2015-11-25 09:22:01 -07:00
drbd_receiver.c drbd: Create a dedicated workqueue for sending acks on the control connection 2015-11-25 09:22:01 -07:00
drbd_req.c drbd: Create a dedicated workqueue for sending acks on the control connection 2015-11-25 09:22:01 -07:00
drbd_req.h drbd: De-inline drbd_should_do_remote() and drbd_should_send_out_of_sync() 2015-11-25 09:22:00 -07:00
drbd_state_change.h drbd: Backport the "events2" command 2015-11-25 09:22:00 -07:00
drbd_state.c drbd: fix NULL deref in remember_new_state 2015-11-25 09:22:01 -07:00
drbd_state.h drbd: Fix locking across all resources 2015-11-25 09:22:00 -07:00
drbd_strings.c drbd: Move string function prototypes from linux/drbd.h to drbd_string.h 2014-02-17 16:50:37 +01:00
drbd_strings.h drbd: Move string function prototypes from linux/drbd.h to drbd_string.h 2014-02-17 16:50:37 +01:00
drbd_vli.h Fix common misspellings 2011-03-31 11:26:23 -03:00
drbd_worker.c drbd: Create a dedicated workqueue for sending acks on the control connection 2015-11-25 09:22:01 -07:00
Kconfig drbd: update Kconfig to match current dependencies 2012-12-06 13:08:29 +01:00
Makefile drbd: debugfs: add basic hierarchy 2014-07-10 18:35:16 +02:00