Xen devel - Apr 2005 - sharing memory between unprivileged guests

Is there any way for unprivileged guests to map each others memory
without grant tables? Now that the pressure is off for me to support
SMP internally, I''d like to switch back to using -testing.

Thanks.

                  -Kip

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On 27 Apr 2005, at 03:56, Kip Macy wrote:
> Is there any way for unprivileged guests to map each others memory
> without grant tables? Now that the pressure is off for me to support
> SMP internally, I''d like to switch back to using -testing.
Currently not. We''d like to support more general and wide-scale sharing
of pages than grant tables were designed to support (for shared buffer 
cache and lightweight VM cloning, for example), but that isn''t 
implemented yet and certainly won''t appear in the 2.0 series.

  -- Keir


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> > Is there any way for unprivileged guests to map each others memory
> > without grant tables? Now that the pressure is off for me to support
> > SMP internally, I''d like to switch back to using -testing.
>
> Currently not. We''d like to support more general and wide-scale
sharing
> of pages than grant tables were designed to support (for shared buffer
> cache and lightweight VM cloning, for example),
I''ll be looking at this for XenFS at some stage in the nearish future. 
Before
I get into that, there are some more VFS-level features I want to get 
working.

Cheers,
Mark
> but that isn''t 
> implemented yet and certainly won''t appear in the 2.0 series.
>
>   -- Keir
>
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel
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is there a link to info on xenfs ?

On Thu, Apr 28, 2005 at 02:40:15AM +0100, Mark Williamson
wrote:
> > Currently not. We''d like to support more general and
wide-scale sharing
> > of pages than grant tables were designed to support (for shared buffer
> > cache and lightweight VM cloning, for example),
> 
> I''ll be looking at this for XenFS at some stage in the nearish
future.  Before
> I get into that, there are some more VFS-level features I want to get 
> working.
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http://wiki.xensource.com/xenwiki/XenFS

On 4/27/05, Wim Coekaerts <wim.coekaerts@oracle.com>
wrote:
> is there a link to info on xenfs ?
> 
> On Thu, Apr 28, 2005 at 02:40:15AM +0100, Mark Williamson wrote:
> > > Currently not. We''d like to support more general and
wide-scale sharing
> > > of pages than grant tables were designed to support (for shared
buffer
> > > cache and lightweight VM cloning, for example),
> >
> > I''ll be looking at this for XenFS at some stage in the
nearish future.  Before
> > I get into that, there are some more VFS-level features I want to get
> > working.
>
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> is there a link to info on xenfs ?
http://wiki.xensource.com/xenwiki/XenFS

If you have any questions just fire them at the list and I''ll do my
best to
reply and update the wiki page.

Cheers,
Mark
> On Thu, Apr 28, 2005 at 02:40:15AM +0100, Mark Williamson wrote:
> > > Currently not. We''d like to support more general and
wide-scale sharing
> > > of pages than grant tables were designed to support (for shared
buffer
> > > cache and lightweight VM cloning, for example),
> >
> > I''ll be looking at this for XenFS at some stage in the
nearish future.
> > Before I get into that, there are some more VFS-level features I want
to
> > get working.
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