Re: [PATCH] Add support for usbfs zerocopy.

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On Tue, 22 Dec 2015, Oliver Neukum wrote:

> On Tue, 2015-12-22 at 01:12 +0100, Steinar H. Gunderson wrote:
> > On Tue, Dec 15, 2015 at 03:32:45PM +0000, David Laight wrote:
> > > That still isn't entirely correct.
> > > 
> > > Someone with more knowledge than either of us has needs to sort out
> > > how to handle this properly.
> > 
> > This discussion sort of stalled. Short of actually becoming a kernel VM
> > expert (not very likely), is there anything I can do to help move this
> > forward?
> 
> It may be profitable to look at how other drivers do this.
> graphics should have the same issues. Maybe sound, too.

Steinar, you can look at those if you want to.  But I really don't 
think anything more is needed other than the try_module_get and 
module_put calls.  At least, the Linux Device Drivers book doesn't 
mention anything else.

Alan Stern

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