On Fri, 17 Apr 2020 15:15:43 +0800 Leo Yan <leo.yan@xxxxxxxxxx> wrote: > Good analysis, Masami :) Agreed. Nice work Masami! > > Seems to me, Arm64 should study Arm platform to change using > trace_ipi_raise_rcuidle() to work around the restriction so can allow the > event to work in idle context? Also agree. Looks to need the rcuidle() variant. -- Steve