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authorPhilipp Reisner <philipp.reisner@linbit.com>2015-03-16 16:08:29 +0100
committerJens Axboe <axboe@fb.com>2015-11-25 17:22:01 +0100
commit668700b40a7c8727bbd2b3fd4fd22e0ce3f1aeb6 (patch)
tree20c6ee044e5d91700bea7c3d3a601ecf3234753d /crypto/crc32.c
parentdrbd: Rename asender to ack_receiver (diff)
downloadlinux-668700b40a7c8727bbd2b3fd4fd22e0ce3f1aeb6.tar.xz
linux-668700b40a7c8727bbd2b3fd4fd22e0ce3f1aeb6.zip
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 'crypto/crc32.c')
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