Messages in this thread | | | Date | Thu, 25 Sep 2014 16:20:37 +0200 | Subject | Re: linux-stable: backport usb related commit to 3.10 and 3.12? | From | Frans Klaver <> |
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On Sat, Aug 23, 2014 at 1:19 PM, Schrey <debian-kernel@schreyben.de> wrote: > Greetings. > > On an administered server, I noticed that there's a constant load > around 0.70 when running kernels 3.10 and 3.12, even if > the system is doing nothing, and in single user mode. > Culprit seems to be the process 'khubd'. > No such effect when running kernels 3.4 or 3.14. > > I reverse bisected linux-stable and found that the following commit > fixes it for me, for both kernel 3.10 and 3.12: > > [08d1dec6f4054e3613f32051d9b149d4203ce0d2] usb:hub set hub->change_bits when > over-current happens > > > Could that commit be backported to the stable 3.10 and 3.12 series? > > (Disclaimer: I'm not a programmer, but I'd be happy to help with any testing > involved) > > Regards > Ingmar > > -------------------------------------------------------------------------- > > $ git diff ac5166bcdb43889a5bd837f5076b78049e1f8bca > 08d1dec6f4054e3613f32051d9b149d4203ce0d2 > diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c > index c1422a0..babba88 100644 > --- a/drivers/usb/core/hub.c > +++ b/drivers/usb/core/hub.c > @@ -1147,7 +1147,8 @@ static void hub_activate(struct usb_hub *hub, enum > hub_activation_type type) > /* Tell khubd to disconnect the device or > * check for a new connection > */ > - if (udev || (portstatus & USB_PORT_STAT_CONNECTION)) > + if (udev || (portstatus & USB_PORT_STAT_CONNECTION) > || > + (portstatus & USB_PORT_STAT_OVERCURRENT)) > set_bit(port1, hub->change_bits); > > } else if (portstatus & USB_PORT_STAT_ENABLE) { >
I think this could be eligible for backporting. I
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