module in domU

module in domU

[__gary]

Hi, everyone. 
I wrote a module using xen's grant mechanism to realize a share memory
function between domU and dom0.
The module in domU side can be compiled but can not be inserted using
"insmod".
The error message shows that some xen grant mechanism function is not
defined.

my opinion
1) do i need a pv-domU kernel, then the xen grant mechanism is included?
2) compile the xen module into the kernel( please kindly tell me how to do
this)

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Re: module in domU

[Konrad Rzeszutek Wilk]

On Wed, May 25, 2011 at 01:57:04AM -0700, __gary wrote:
> Hi, everyone. 
> I wrote a module using xen's grant mechanism to realize a share memory
> function between domU and dom0.

Why not use the existing code? There is a gntdev and gntalloc in 2.6.39
you can use that will do this. Google for gntalloc.

> The module in domU side can be compiled but can not be inserted using
> "insmod".
> The error message shows that some xen grant mechanism function is not
> defined.
> 
> my opinion
> 1) do i need a pv-domU kernel, then the xen grant mechanism is included?
> 2) compile the xen module into the kernel( please kindly tell me how to do
> this)
> 
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> View this message in context: http://xen.1045712.n5.nabble.com/module-in-domU-tp4424653p4424653.html
> Sent from the Xen - Dev mailing list archive at Nabble.com.
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel

Re: module in domU

[Ian Campbell]

On Mon, 2011-06-06 at 15:51 +0100, Konrad Rzeszutek Wilk wrote:
> On Wed, May 25, 2011 at 01:57:04AM -0700, __gary wrote:
> > Hi, everyone. 
> > I wrote a module using xen's grant mechanism to realize a share memory
> > function between domU and dom0.
> 
> Why not use the existing code? There is a gntdev and gntalloc in 2.6.39
> you can use that will do this. Google for gntalloc.

gntdev and gntalloc are for userspace users, this question appears to be
about domU kernel modules.

The question of whether gary's functionality belongs in kernel or
userspace is a valid one, but not one we can answer with the info given.

> > The module in domU side can be compiled but can not be inserted using
> > "insmod".
> > The error message shows that some xen grant mechanism function is not
> > defined.

Which functions specifically are mentioned. Please read
http://wiki.xensource.com/xenwiki/AskingXenDevelQuestions.

Ian.

> > 
> > my opinion
> > 1) do i need a pv-domU kernel, then the xen grant mechanism is included?
> > 2) compile the xen module into the kernel( please kindly tell me how to do
> > this)
> > 
> > --
> > View this message in context: http://xen.1045712.n5.nabble.com/module-in-domU-tp4424653p4424653.html
> > Sent from the Xen - Dev mailing list archive at Nabble.com.
> > 
> > _______________________________________________
> > Xen-devel mailing list
> > Xen-devel@lists.xensource.com
> > http://lists.xensource.com/xen-devel
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
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