On 22.05.2017 11:48, Christoph Gohle wrote:
Hey Mathias,
On 19 May 2017, at 09:58, Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx> wrote:
4.11 kernel has xhci traces enabled, could you try to reproduce it with 4.11?
xhci traces can be enabled with:
echo 1 > /sys/kernel/debug/tracing/events/xhci-hcd/enable
If you know how to reliably reproduce this then please enable tracing just before
triggering this. It generates a lot of data.
-Mathias
I would be able to do xhci traces with a 4.10 kernel (4.10.0-21-generic #23~16.04.1-Ubuntu SMP). Don’t really want to go to 4.11. . Still interested?
xhci got more useful tracing support in 4.11,
Sure, you can try if there's something in 4.10
Where do these traces go?
mount -t debugfs none /sys/kernel/debug
cat /sys/kernel/debug/tracing/trace
-Mathias
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