Just replying to one comment now, the rest will need more thought :-) On Friday 29 August 2008, Alan Stern wrote: > > Two problems: > > - CONFIG_USB_DEBUG causes such a huge load of output that it is > > totally unacceptable to have that enabled permanently for a running > > system > > It shouldn't do that. Almost all of the extra output occurs when > devices are plugged in or unplugged; during normal operation there > should be very few extra messages. (Depending on what USB drivers you > use, I suppose...) Here's a snippet of what I got when I enabled USB debug recently: [...] Aug 6 22:06:23 faramir kernel: hub 2-0:1.0: hub_resume Aug 6 22:06:23 faramir kernel: hub 2-0:1.0: state 7 ports 2 chg 0000 evt 0000 Aug 6 22:06:23 faramir kernel: usb usb1: usb auto-resume Aug 6 22:06:23 faramir kernel: usb usb1: wakeup_rh Aug 6 22:06:23 faramir kernel: hub 1-0:1.0: hub_resume Aug 6 22:06:23 faramir kernel: hub 1-0:1.0: state 7 ports 2 chg 0000 evt 0000 Aug 6 22:06:24 faramir kernel: usb usb2: suspend_rh (auto-stop) Aug 6 22:06:24 faramir kernel: usb usb1: suspend_rh (auto-stop) Aug 6 22:06:25 faramir kernel: hub 5-0:1.0: hub_suspend Aug 6 22:06:25 faramir kernel: usb usb5: bus auto-suspend Aug 6 22:06:25 faramir kernel: ehci_hcd 0000:00:1d.7: suspend root hub Aug 6 22:06:25 faramir kernel: hub 2-0:1.0: hub_suspend Aug 6 22:06:25 faramir kernel: usb usb2: bus auto-suspend Aug 6 22:06:25 faramir kernel: usb usb2: suspend_rh Aug 6 22:06:25 faramir kernel: hub 1-0:1.0: hub_suspend Aug 6 22:06:25 faramir kernel: usb usb1: bus auto-suspend Aug 6 22:06:25 faramir kernel: usb usb1: suspend_rh Aug 6 22:06:28 faramir kernel: usb usb5: usb auto-resume Aug 6 22:06:28 faramir kernel: ehci_hcd 0000:00:1d.7: resume root hub Aug 6 22:06:28 faramir kernel: hub 5-0:1.0: hub_resume Aug 6 22:06:28 faramir kernel: hub 5-0:1.0: state 7 ports 8 chg 0000 evt fe00 Aug 6 22:06:28 faramir kernel: usb usb2: usb auto-resume Aug 6 22:06:28 faramir kernel: usb usb2: wakeup_rh Aug 6 22:06:28 faramir kernel: hub 2-0:1.0: hub_resume Aug 6 22:06:28 faramir kernel: usb usb1: usb auto-resume Aug 6 22:06:28 faramir kernel: usb usb1: wakeup_rh Aug 6 22:06:28 faramir kernel: hub 2-0:1.0: state 7 ports 2 chg 0000 evt 0000 Aug 6 22:06:28 faramir kernel: hub 1-0:1.0: hub_resume Aug 6 22:06:28 faramir kernel: hub 1-0:1.0: state 7 ports 2 chg 0000 evt 0000 Aug 6 22:06:29 faramir kernel: usb usb2: suspend_rh (auto-stop) Aug 6 22:06:29 faramir kernel: usb usb1: suspend_rh (auto-stop) [...] AFAIK I have not enabled anything special in userland when it comes to USB suspension; this is just a standard boot. I do have CONFIG_USB_SUSPEND enabled though, so maybe one should not do that when using USB_DEBUG? -- To unsubscribe from this list: send the line "unsubscribe kernel-testers" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
