On Wed, 01 Mar 2017 18:01:31 -0800 Todd Brandt <todd.e.bra...@linux.intel.com> wrote:
> I've been using early boot trace to gather callgraph data on filtered > functions but something appears to have broken it in v10.0. The graph > trace worked fine in v4.10-rc8, so something changed since the release. > > Issue: > Using the ftrace_graph_filter kernel parameter to filter on a specific > function produces no data (msleep for instance). The graph trace also > continues to produce nothing even after reconfiguring it through > debugfs. It worked fine in v4.10-rc8 but fails in v4.10. > 4.10 is fine. It's what has been merged for 4.11 that's broken. I'm doing a bisect now to see what broke it. Yes, lots of commits touched that code recently. I'll have to add this command line as one of my tests I perform. Thanks! -- Steve
