Messages in this thread | | | Date | Wed, 1 Mar 2017 22:28:43 -0500 | From | Steven Rostedt <> | Subject | Re: ftrace_graph_filter not working correctly since v4.10 |
| |
On Wed, 01 Mar 2017 18:01:31 -0800 Todd Brandt <todd.e.brandt@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
| |