On Thu, 31 Oct 2013, Cliff Brake wrote: > On Thu, Oct 31, 2013 at 1:54 PM, Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> wrote: > > > Ick, that's not good. This sounds like a driver issue, if you can find > > out where interrupts are being held for so long, hopefully a fix can be > > found and resolved. It's good that 3.11 is better, but ideally a real > > fix can be created. > > > > What host controller driver are you using? > > Its the USB EHCI host in the TI DM3730, so it uses the > drivers/usb/host/ehci-omap.c driver. You can find out exactly what part of the kernel is responsible for interrupt delays by using the "irqsoff" tracer. See Documentation/trace/ftrace.txt for details about how to use it. Alan Stern -- 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
