On Thursday 11 April 2013 19:42:53 Ming Lei wrote:
> On Thu, Apr 11, 2013 at 7:08 PM, Bjørn Mork <[email protected]> wrote:
> >
> > The docs for usb_submit_urb() in drivers/usb/core/urb.c lists some
> > possible mem_flags use cases. Among these are (where (b) and (c) are
> > cases needing GFP_ATOMIC and not applicable here):
> >
> > <quote>
> > * (3) If you use a kernel thread with a network driver you must use
> > * GFP_NOIO, unless (b) or (c) apply;
> > </quote>
> >
> > Is this example
> > a) wrong, or
> > b) not applicable, or
> > c) to be excluded from the new API?
>
> IMO, it may be a) or b), and we can find many GFP_KERNEL usage
> inside usbnet(kevent(), ...).
Only in the rx path.
> Also (3) doesn't explain the cause. Oliver, could you give a hit?
IIRC this was to cover networked file systems.
Regards
Oliver
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