PATCH: high_perf: respond methods want a msg arg

After a continuation where the next called hook didn't provide a second arg
to return, the corresponding respond method would get confused.

Brian

• PATCH: high_perf: respond methods want a msg arg by Brian Grossman
• Re: PATCH: high_perf: respond methods want a msg arg by Matt Sergeant
• Re: PATCH: high_perf: respond methods want a msg arg by Brian Grossman
• Re: PATCH: high_perf: respond methods want a msg arg by Matt Sergeant