Add fault_major, fault_minor page fault trace events
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Cover letter [PATCH 0/3] Add fault_major, fault_minor page fault trace events
Quoted 8 lines · Chris Redmon
These changes add common trace events for major and minor page faults, as well as adding these traces to the arm and arm64 architectures. These traces offer useful information for determining the source of page faults in realtime systems, as well as the time penalty for taking a major or minor page fault.
I made an attempt to minimize the overhead when these tracepoints are not enabled, but I'm willing to make more changes if desired.
Why is this necessary, given that we already report these types of fault as perf sw events?
Will