Am Donnerstag 03 Juli 2008 00:16:52 schrieb Laurent Pinchart:
> On Wednesday 02 July 2008, Oliver Neukum wrote:
> > Am Dienstag 01 Juli 2008 14:52:33 schrieb Laurent Pinchart:
> > > Hi Oliver,
> > >
> > > On Tuesday 01 July 2008, Oliver Neukum wrote:
> > > > int uvc_status_resume(struct uvc_device *dev)
> > > > {
> > > > if (dev->int_urb == NULL)
> > > > return 0;
> > > >
> > > > return usb_submit_urb(dev->int_urb, GFP_KERNEL);
> > > > }
> > > >
> > > > Hi,
> > > >
> > > > if you are waking up from a system suspend, your swap device may still
> > > > be asleep. Better use GFP_NOIO.
> > >
> > > Thanks for the report.
> > >
> > > I assume the same is true for the video resume path where I allocate and
> > > submit the video data URBs. The amount of memory the driver allocates
> > > there is higher, is there anything I should pay attention to to lower the
> > > memory pressure introduced by GFP_NOIO ?
> >
> > How much memory is that?
>
> For isochronous transfers (bulk transfers use smaller buffers), the driver
> allocates five video buffers of at 240kB each.
That is over 1MB in the worst case. Can't you keep the buffers allocated?
Regards
Oliver
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