Re: Infrastructure for zerocopy I/O

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On Fri, 4 Dec 2015, Steinar H. Gunderson wrote:

> On Fri, Dec 04, 2015 at 01:29:05AM +0100, Steinar H. Gunderson wrote:
> > I must be doing something wrong, because I don't seem to get any frames
> > from my video capture, and when I close the application, I get a slowpath
> > warning:
> 
> OK, the slowpath warning is a red herring -- it's just because I do the free
> under a spinlock, and I can fix that.
> 
> There's still something that causes me to not get any frames, though.

What does usbmon show?  (See Documentation/usb/usbmon.txt.)

Alan Stern

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