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Users need to know how to make events persist now that we allow for that. We also now allow the dynamic_events file to create events by utilizing the persist flag during event register. Add back in to documentation how /sys/kernel/tracing/dynamic_events can be used to create persistent user_events. Add a section under registering for the currently supported flags (USER_EVENT_REG_PERSIST) and the required permissions. Add a note under deleting that deleting a persistent event also requires sufficient permission. Link: https://lkml.kernel.org/r/20230912180704.1284-4-beaub@linux.microsoft.com Signed-off-by: Beau Belgrave <beaub@linux.microsoft.com> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>