On Tue, Nov 05, 2019 at 04:41:07PM +0100, Oliver Neukum wrote:
> Am Dienstag, den 05.11.2019, 10:09 -0500 schrieb Alan Stern:
> > On Tue, 5 Nov 2019, Oliver Neukum wrote:
> >
> > > Am Montag, den 04.11.2019, 22:45 +0100 schrieb Greg Kroah-Hartman:
> > > > Since commit ea44d190764b ("usbip: Implement SG support to
> > > > vhci-hcd and stub driver") was merged, the USB/IP driver can
> > > > also handle SG.
> > >
> > > Hi,
> > >
> > > same story as 4.4.x
> >
> > I'm not sure about uas, but it was reported just yesterday that the
> > corresponding commit for usb-storage caused a 30% speed degradation:
> >
> > https://marc.info/?l=linux-usb&m=157293660212040&w=2
> >
> > Given this information, perhaps you will decide that the revert is
> > worthwhile.
>
> Damned if I do, damned if I do not.
> Check for usbip and special case it?
We should be able to do that in the host controller driver for usbip,
right? What is the symptom if you use a UAS device with usbip and this
commit?
thanks,
greg k-h
