On Tue, Sep 4, 2012 at 6:36 PM, Bjørn Mork wrote:
>
> I believe any Ericsson or Gobi modem would do, and most likely other USB
> networking devices too.
>
> I haven't explored the gadget. Doesn't it support remote wakeup? Well,
No.
> it doesn't really have to just for testing this. You just h
Ming Lei writes:
> On Tue, Sep 4, 2012 at 3:49 PM, Bjørn Mork wrote:
>>
>> That's easy:
>>
>> - Take any usbnet device supporting remote wakeup (and of course with a
>> minidriver supporting it as well),
>> - enable autosuspend,
>> - ip link set dev ethX/usbX/wwanX up
>>
>> And watch ksoftirqd/
On Tue, Sep 4, 2012 at 3:49 PM, Bjørn Mork wrote:
>
> That's easy:
>
> - Take any usbnet device supporting remote wakeup (and of course with a
> minidriver supporting it as well),
> - enable autosuspend,
> - ip link set dev ethX/usbX/wwanX up
>
> And watch ksoftirqd/X use 100% of one of your CPU
Bjørn Mork writes:
> And I do believe the code before your change demonstrated that the
> original authors had the same view. There was an explicit exception for
> just this case, and I do assume that was put there for a good
> reason. usbnet_bh() will be called while the device is suspended, an
Ming Lei writes:
> On Mon, Sep 3, 2012 at 4:26 PM, Bjørn Mork wrote:
>
>> Sorry for not noticing this before, but commit 65841fd5
>> makes usbnet autosuspend completely unusable. The device
>> is suspended fine, but burning one CPU core at full load
>> uses a tiny bit more power making the power
On Mon, Sep 3, 2012 at 4:26 PM, Bjørn Mork wrote:
> Suspending an open usbnet device results in constant
> rescheduling of usbnet_bh.
>
> commit 65841fd5 "usbnet: handle remote wakeup asap"
> refactored the usbnet_bh code to allow sharing the
> urb allocate and submit code with usbnet_resume. In
>
From: Bjørn Mork
Date: Mon, 3 Sep 2012 10:26:18 +0200
> Suspending an open usbnet device results in constant
> rescheduling of usbnet_bh.
>
> commit 65841fd5 "usbnet: handle remote wakeup asap"
> refactored the usbnet_bh code to allow sharing the
> urb allocate and submit code with usbnet_resum
Suspending an open usbnet device results in constant
rescheduling of usbnet_bh.
commit 65841fd5 "usbnet: handle remote wakeup asap"
refactored the usbnet_bh code to allow sharing the
urb allocate and submit code with usbnet_resume. In
this process, a test for, and immediate return on,
ENOLINK from
