Re: USB problem on x86_64: nommu_map_single() issue?

[FUJITA Tomonori]

On Tue, 14 Oct 2008 12:45:00 +0200
Nicolas Bareil <nico@xxxxxxxxx> wrote:

> Hi Oliver,
> 
> On Tue, Oct 14, 2008 at 11:48:47AM +0200, Oliver Neukum wrote:
> > > On 2.6.27, I can't use any USB device (mass storage, mouse) anymore on my x86_64 system, the devices
> > > are not detected: lsusb returns nothing except the hub.
> > 
> > Is this a regression? Did it work on earlier kernels?
> 
> Yes this is a regression: USB works in 2.6.26.x with (almost) the same configuration.

With old kernels, you can find something like the following line in
the boot log?

PCI-DMA: Using software bounce buffering for IO (SWIOTLB)
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