smp: Backport CSD tracepoints
Merge Request Required Information
Summary of Changes
Introduce csd tracepoints that help tracking IPIs that can be messing with latency. Also, make the trace available for all smp_function_call*(), not only the ones that result in an IPI.
Approved Development Ticket
JIRA: https://issues.redhat.com/browse/RHEL-13876
Signed-off-by: Leonardo Bras leobras@redhat.com
Edited by Leonardo Brás