Messages in this thread |  | | Subject | Re: [BUG] function_graph trace causes hang when using sleepgraph (4.15.0-rc1 and newer) | | From | Todd Brandt <> | | Date | Wed, 10 Jan 2018 16:21:08 -0800 |
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On Tue, 2018-01-09 at 11:13 -0500, Steven Rostedt wrote: > On Mon, 08 Jan 2018 17:25:15 -0800 > Todd Brandt <todd.e.brandt@linux.intel.com> wrote: > > > Can you reproduce the issue there? I just want to be sure it's not > > something local to our machines here, as long as you have CONFIG_PM > > enabled it should work the same hopefully. > > Just to let you know, I'm currently traveling, so my testing ability > is > limited at the time being.
ok, it's not an emergency, we're using a patched version of the kernel with those two commits removed in the interim. I tried running kgdb over serial console, but unfortunately it doesn't work over a USB-to- Serial dongle (even Greg K-H says it won't work, :P). This is the best output I could get, considering:
# run the test script here [ 545.733458] PM: suspend entry (deep) [ 545.734535] PM: Syncing filesystems ... done. [ 546.580551] Freezing user space processes ... (elapsed 0.013 seconds) done. [ 546.594846] OOM killer disabled. [ 546.595002] Freezing remaining freezable tasks ... (elapsed 0.005 seconds) done. [ 557.808719] NMI watchdog: Watchdog detected hard LOCKUP on cpu 0
So it's definitely a hard lockup, I just can't get the stack trace without a system with a built in serial console.
> > -- Steve
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