On Tue, Mar 21, 2017 at 10:04 AM, Diego Viola <diego.viola@xxxxxxxxx> wrote: > On Mon, Mar 20, 2017 at 8:15 PM, Diego Viola <diego.viola@xxxxxxxxx> wrote: >> On Mon, Mar 20, 2017 at 3:27 PM, Diego Viola <diego.viola@xxxxxxxxx> wrote: >>> On Mon, Mar 20, 2017 at 1:32 PM, Mathias Nyman >>> <mathias.nyman@xxxxxxxxxxxxxxx> wrote: >>>> On 20.03.2017 17:39, Diego Viola wrote: >>>>> >>>>> On Mon, Mar 20, 2017 at 11:21 AM, Mathias Nyman >>>>> <mathias.nyman@xxxxxxxxxxxxxxx> wrote: >>>>>> >>>>>> On 19.03.2017 23:29, Diego Viola wrote: >>>>>>> >>>>>>> >>>> >>>>>>>> Still a problem with 4.11.0-rc2-ARCH+ >>>>>> >>>>>> 4.11-rc2 has better xhci tracing, it shows each URB enqueue and dequeue >>>>>> and >>>>>> giveback. >>>>>> >>>>>> Could you try enabling xhci tracing before suspending (not the same as >>>>>> xhci >>>>>> verbose dynamic debug) >>>>>> It will generate a lot of data, so better to remove all extra USB >>>>>> devices. >>>>>> >>>>>> xhci tracing can be added with: >>>>>> >>>>>> mount -t debugfs none /sys/kernel/debug >>>>>> echo xhci-hcd >> /sys/kernel/debug/tracing/set_event >>>>>> >>>>>> and then send the output of cat /sys/kernel/debug/tracing/trace >>>>> >>>>> >>>>> https://bugzilla.kernel.org/attachment.cgi?id=255367 >>>>> >>>>> This is with Linux 4.11.0-rc3-ARCH. >>>>> >>>>> USB mouse/keyboard was unplugged before booting the machine. >>>>> >>>>> I didn't do a suspend/resume before getting this trace, should I do that? >>>>> >>>>> Should I reproduce the hang and get a netconsole dmesg capture with >>>>> tracing enabled? >>>> >>>> >>>> A trace and a dmesg of the same suspend/reusume hang would be great. >>> >>> I can capture the dmesg with netconsole once the machine hangs, but >>> I'm not sure how I could capture /sys/kernel/debug/tracing/trace after >>> the hang. I'm unable to use ssh after the hang. >>> >>>> And if you can then one of a succesful suspend/resume for reference. >>> >>> Here's the trace after a successful suspend/resume: >>> >>> https://bugzilla.kernel.org/attachment.cgi?id=255369 >>> >>>> >>>> (I haven't yet checked the one you added to bugzilla) >>>> >>>> -Mathias >>> >>> Diego >> >> ftrace_dump_on_oops is what I was looking for. >> >> Diego > > I tried ftrace_dump_on_oops but I can't see the trace coming in, not > sure what I'm doing wrong. :( > > Diego I was able to obtain the trace with this: hung_task_panic=1 no_console_suspend=1 ftrace_dump_on_oops Diego -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
