]> git.openfabrics.org - ~shefty/rdma-dev.git/commit
CPU hotplug, writeback: Don't call writeback_set_ratelimit() too often during hotplug
authorSrivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Fri, 28 Sep 2012 12:27:49 +0000 (20:27 +0800)
committerFengguang Wu <fengguang.wu@intel.com>
Fri, 28 Sep 2012 12:27:49 +0000 (20:27 +0800)
commit2f60d628ffd042e65e0b1d3431fb3e38d6f7c1be
treeab0abd6f9936db1441382f862028a4c22b7239e1
parent0e2f2b23672055e1301c11509d5b8eda7b718d8e
CPU hotplug, writeback: Don't call writeback_set_ratelimit() too often during hotplug

The CPU hotplug callback related to writeback calls writeback_set_ratelimit()
during every state change in the hotplug sequence. This is unnecessary
since num_online_cpus() changes only once during the entire hotplug operation.

So invoke the function only once per hotplug, thereby avoiding the
unnecessary repetition of those costly calculations.

Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
mm/page-writeback.c