"Jeff Hostetler via GitGitGadget" [off-list ref] writes:
This patch series contains a greatly refactored version of my original
Trace2 series [1] from August 2018.
Great to see this series revived. Looking forward to reading it
thru.
Thanks.
A new design doc in Documentation/technical/api-trace2.txt (in the first
commit) explains the relationship of Trace2 to the current tracing facility.
Calls to the current tracing facility have not been changed, rather new
trace2 calls have been added so that both continue to work in parallel for
the time being.