Re: [Xen-devel] Re: pv_ops dom0 USB fixed

[Gerd Hoffmann <kraxel@xxxxxxxxxx>]

Jeremy Fitzhardinge wrote:
> Can you try changing include/linux/libata.h:
> 
> -#undef ATA_DEBUG        /* debugging output */
> +#define ATA_DEBUG        /* debugging output */

Log became a bit longer ...
http://kraxel.fedorapeople.org/for-jeremy/

There is also a (maybe related) BUG in there.

It fails notably faster now, early in the init scripts.  Some race
maybe?   The timing changes due to the excessive debug output makes it
happen more likely?

> Also, does swiotlb=0 make any difference?

It doesn't.  Hmm, from the boot messages it looks like it doesn't
actually disable the swiotb ...

HTH,
  Gerd

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