K 10
svn:author
V 3
imp
K 8
svn:date
V 27
2018-11-15T16:02:45.555012Z
K 7
svn:log
V 411
Add cam_iosched_set_latfcn to set a latency callback for high latency.

It's often useful to have a callback when an I/O takes more than a
threshold amount of time. This adds the infrastructure for periph
devices to register one.

One use-case is as a debugging aide when you need a semi-realtime
indication of an I/O outlier so you can trigger bus capture gear for
vendor analysis.

Sponsored by: Netflix, Inc

END