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 -- 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
