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Re: [Xen-devel] Errors when build 2.6.31-rc8

To: M A Young <m.a.young@xxxxxxxxxxxx>
Subject: Re: [Xen-devel] Errors when build 2.6.31-rc8
From: Boris Derzhavets <bderzhavets@xxxxxxxxx>
Date: Sat, 5 Sep 2009 05:45:39 -0700 (PDT)
Cc: Jeremy Fitzhardinge <jeremy@xxxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
Delivery-date: Sat, 05 Sep 2009 05:46:13 -0700
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After this change:-

   -*- /dev/agpgart (AGP Support)  --->                                                 
   < > Direct Rendering Manager (XFree86 4.1.0 and higher DRI support)

i was able to build 2.6.31-rc8 (with Xen Dom0 support).

However, attempt to load 2.6.31-rc8 either under Xen 3.5 or Xen 3.4.1 causes console to drop into stack trace and hangs.

Thank you.
Boris.

--- On Sat, 9/5/09, M A Young <m.a.young@xxxxxxxxxxxx> wrote:

From: M A Young <m.a.young@xxxxxxxxxxxx>
Subject: Re: [Xen-devel] Errors when build 2.6.31-rc8
To: "Boris Derzhavets" <bderzhavets@xxxxxxxxx>
Cc: "Jeremy Fitzhardinge" <jeremy@xxxxxxxx>, "Xen-devel" <xen-devel@xxxxxxxxxxxxxxxxxxx>
Date: Saturday, September 5, 2009, 7:31 AM

On Sat, 5 Sep 2009, Boris Derzhavets wrote:

> After fresh git clone, git checkout tune "make menuconfig" the same way as
> for RC6
>
> When build :-
>
> In file included from /usr/src/linux-2.6-xen/arch/x86/include/asm/agp.h:5,
>                  from drivers/gpu/drm/ttm/ttm_agp_backend.c:40:
> include/linux/swiotlb.h:48: warning: ?enum dma_data_direction? declared inside
> parameter list

I think there is a conflict between the newer drm code and swiotlb. I have seen this for a while on my Fedora builds as Fedora Rawhide seems to get the new drm code before it makes it into the official kernel. You can work around it by disabling a small number of drm related kernel options, though you probably lose some functionality by doing so.

    Michael Young

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