From mboxrd@z Thu Jan  1 00:00:00 1970
From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Subject: Re: Sound not working properly on Xen Dom0,
 but works on native
Date: Wed, 19 Dec 2012 13:32:39 -0500
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To: Todd Deshane <todd.deshane@xen.org>
Cc: Konrad Rzeszutek Wilk <konrad@darnok.org>, xen-devel mailing list <xen-devel@lists.xensource.com>, David Vrabel <david.vrabel@citrix.com>
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On Thu, Feb 09, 2012 at 09:07:38PM -0500, Todd Deshane wrote:
> On Thu, Feb 9, 2012 at 2:55 PM, David Vrabel <david.vrabel@citrix.com> wrote:
> > On 09/02/12 17:42, Konrad Rzeszutek Wilk wrote:
> >> On Sat, Jan 28, 2012 at 01:19:23PM -0500, Todd Deshane wrote:
> >>> On Tue, Jan 17, 2012 at 11:12 AM, Konrad Rzeszutek Wilk
> >>> <konrad.wilk@oracle.com> wrote:
> >>>> On Sun, Jan 15, 2012 at 07:12:52PM -0500, Todd Deshane wrote:
> >>>>> Hi,
> >>>>>
> >>>>> I'm doing some testing on Ubuntu 12.04 Alpha. All sounds comes out as
> >>>>> static on the Dom0 system. (I can PCI passthrough the audio card to a
> >>>>> DomU and that works). Native sound works fine.
> >>>>>
> >>>>> Linux kronos 3.2.0-8-generic-pae #15-Ubuntu SMP Wed Jan 11 15:34:57
> >>>>> UTC 2012 i686 i686 i386 GNU/Linux
> >>>>
> >>>> Did you try 64-bit dom0?
> >>>
> >>> 64bit Dom0 works perfectly.
> >>
> >> Aha! I have an inkling this is the
> >> 7a7546b377bdaa25ac77f33d9433c59f259b9688
> >
> > This is "x86: xen: size struct xen_spinlock to always fit in
> > arch_spinlock_t" from the 3.2 stable tree.
> >
> > There are many spinlock in sound/ affected by the bug fixed by the above
> > dunno if any would cause sound distortion but there were plenty of
> > deadlock opportunities though.
> 
> Tried the latest Ubuntu kernel that includes that patch
> (http://archive.ubuntu.com/ubuntu/pool/main/l/linux/linux_3.2.0-15.24.diff.gz)
> and it still has the same problem.

I think this issue has been fixed right? I believe this:
commit b5031ed1be0aa419250557123633453753181643
Author: Ronny Hegewald <ronny.hegewald@online.de>
Date:   Fri Aug 31 09:57:52 2012 +0000

    xen: Use correct masking in xen_swiotlb_alloc_coherent.
    

fixed it?

> 
> Thanks,
> Todd
> 
> -- 
> Todd Deshane
> http://www.linkedin.com/in/deshantm
> http://blog.xen.org/
> http://wiki.xen.org/