Messages in this thread |  | | From | Jeff Moyer <> | Subject | Re: [PATCH 6/8] cfq-iosched: move cfq_group determination from cfq_find_alloc_queue() to cfq_get_queue() | Date | Tue, 09 Jun 2015 10:32:35 -0400 |
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Tejun Heo <tj@kernel.org> writes:
> This is necessary for making async cfq_cgroups per-cfq_group instead > of per-cfq_data. While this change makes cfq_get_queue() perform RCU > locking and look up cfq_group even when it reuses async queue, the > extra overhead is extremely unlikely to be noticeable given that this > is already sitting behind cic->cfqq[] cache and the overall cost of > cfq operation. > > Signed-off-by: Tejun Heo <tj@kernel.org> > Cc: Vivek Goyal <vgoyal@redhat.com> > Cc: Arianna Avanzini <avanzini.arianna@gmail.com>
Reviewed-by: Jeff Moyer <jmoyer@redhat.com>
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