On Fri, 11 Aug 2017 17:01:21 +0530 Pratyush Anand <pan...@redhat.com> wrote:
> hwlat is not a production kernel tracer, however it can be used to > identify any HW latency issue during kernel boot as well.Therefore call > init_hwlat_tracer() though core_initcall() so that we can pass > ftrace=hwlat in kernel commandline parameter and we can have hwlat as > default bootup tracer. > > Signed-off-by: Pratyush Anand <pan...@redhat.com> > --- > kernel/trace/trace_hwlat.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/kernel/trace/trace_hwlat.c b/kernel/trace/trace_hwlat.c > index d7c8e4ec3d9d..09f8f0950b6c 100644 > --- a/kernel/trace/trace_hwlat.c > +++ b/kernel/trace/trace_hwlat.c > @@ -630,4 +630,4 @@ __init static int init_hwlat_tracer(void) > > return 0; > } > -late_initcall(init_hwlat_tracer); > +core_initcall(init_hwlat_tracer); No that is not the right fix. hwlat tracer should not be called by core init. I already have a fix in linux-next. I'm doing some more code that needs testing before I send it to Linus. -- Steve
