On Mon, 23 Nov 2020 16:27:20 +0100 Marco Elver <elver@xxxxxxxxxx> wrote: > On Fri, Nov 20, 2020 at 02:27PM -0500, Steven Rostedt wrote: > > On Thu, 19 Nov 2020 13:53:57 +0100 > > Marco Elver <elver@xxxxxxxxxx> wrote: > > > > > Running tests again, along with the function tracer > > > Running tests on all trace events: > > > Testing all events: > > > BUG: workqueue lockup - pool cpus=0 node=0 flags=0x0 nice=0 stuck for 12s! > > > > The below patch might be noisy, but can you add it to the kernel that > > crashes and see if a particular event causes the issue? > > > > [ note I didn't even compile test. I hope it works ;) ] > > > > Perhaps run it a couple of times to see if it crashes on the same set of > > events each time. > > Thanks! I have attached the logs of 2 runs. I think one problem here is > that the enabling of an event doesn't immediately trigger the problem, > so it's hard to say which one caused it. > I noticed: [ 237.650900] enabling event benchmark_event In both traces. Could you disable CONFIG_TRACEPOINT_BENCHMARK and see if the issue goes away. That event kicks off a thread that spins in a tight loop for some time and could possibly cause some issues. It still shouldn't break things, we can narrow it down if it is the culprit. -- Steve
