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| author | Philipp Reisner <philipp.reisner@linbit.com> | 2015-03-16 18:08:29 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2015-11-25 19:22:01 +0300 |
| commit | 668700b40a7c8727bbd2b3fd4fd22e0ce3f1aeb6 (patch) | |
| tree | 20c6ee044e5d91700bea7c3d3a601ecf3234753d /drivers/block/drbd/drbd_protocol.h | |
| parent | 1c03e52083c8fa6e70a0b921d25d1916f68320fc (diff) | |
| download | linux-668700b40a7c8727bbd2b3fd4fd22e0ce3f1aeb6.tar.xz | |
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>
Diffstat (limited to 'drivers/block/drbd/drbd_protocol.h')
| -rw-r--r-- | drivers/block/drbd/drbd_protocol.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/block/drbd/drbd_protocol.h b/drivers/block/drbd/drbd_protocol.h index 2da9104a3851..ef9245363dcc 100644 --- a/drivers/block/drbd/drbd_protocol.h +++ b/drivers/block/drbd/drbd_protocol.h @@ -23,7 +23,7 @@ enum drbd_packet { P_AUTH_RESPONSE = 0x11, P_STATE_CHG_REQ = 0x12, - /* asender (meta socket */ + /* (meta socket) */ P_PING = 0x13, P_PING_ACK = 0x14, P_RECV_ACK = 0x15, /* Used in protocol B */ |