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xen-devel
Re: [Xen-devel] Re: Next steps with pv_ops for Xen
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To: |
Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> |
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Subject: |
Re: [Xen-devel] Re: Next steps with pv_ops for Xen |
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From: |
Derek Murray <Derek.Murray@xxxxxxxxxxxx> |
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Date: |
Wed, 05 Dec 2007 17:48:49 +0000 |
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Cc: |
"xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Eduardo Habkost <ehabkost@xxxxxxxxxx>, Juan Quintela <quintela@xxxxxxxxxx>, "Stephen C. Tweedie" <sct@xxxxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxxxx>, Glauber de Oliveira Costa <gcosta@xxxxxxxxxx>, Chris Wright <chrisw@xxxxxxxxxxxx>, "virtualization@xxxxxxxxxxxxxx" <virtualization@xxxxxxxxxxxxxx>, Gerd Hoffmann <kraxel@xxxxxxxxxx> |
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Wed, 05 Dec 2007 09:49:24 -0800 |
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<C37C8EDC.1971B%Keir.Fraser@xxxxxxxxxxxx> |
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Keir Fraser wrote:
Need to bite the bullet and fix this properly by setting a software flag in
ptes that are not subject to reference counting.
Could we get away with testing the VM_FOREIGN flag in vm_normal_page()?
Although I get the impression that this wouldn't be easily justified if
trying to merge with upstream Linux....
Unfortunately that also needs a hypervisor interface change, to allow
setting of those pte flags. Easily done though, and we should definitely get
that piece in for 3.2.0.
Alternatively, could we use the _PAGE_GNTTAB PTE flag that is used for
debugging? Indeed, if we did this, could be obviate the need for the
PTE-zapping hook, by instead catching the case where this flag is set,
and unmapping the grant implicitly?
Otherwise, what would the semantics of this new flag be?
Regards,
Derek.
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- Re: [Xen-devel] Re: Next steps with pv_ops for Xen, (continued)
- Re: [Xen-devel] Re: Next steps with pv_ops for Xen, Gerd Hoffmann
- Re: [Xen-devel] Re: Next steps with pv_ops for Xen, Stephen C. Tweedie
- Re: [Xen-devel] Re: Next steps with pv_ops for Xen, Gerd Hoffmann
- Re: [Xen-devel] Re: Next steps with pv_ops for Xen, Derek Murray
- Re: [Xen-devel] Re: Next steps with pv_ops for Xen, Gerd Hoffmann
- Re: [Xen-devel] Re: Next steps with pv_ops for Xen, Keir Fraser
- Re: [Xen-devel] Re: Next steps with pv_ops for Xen, Derek Murray
- Re: [Xen-devel] Re: Next steps with pv_ops for Xen, Keir Fraser
- Re: [Xen-devel] Re: Next steps with pv_ops for Xen, Derek Murray
- Re: [Xen-devel] Re: Next steps with pv_ops for Xen, Keir Fraser
- Re: [Xen-devel] Re: Next steps with pv_ops for Xen,
Derek Murray <=
- Re: [Xen-devel] Re: Next steps with pv_ops for Xen, Keir Fraser
- Re: [Xen-devel] Re: Next steps with pv_ops for Xen, Derek Murray
- Re: [Xen-devel] Re: Next steps with pv_ops for Xen, Isaku Yamahata
- Re: [Xen-devel] Re: Next steps with pv_ops for Xen, Keir Fraser
- Re: [Xen-devel] Re: Next steps with pv_ops for Xen, Isaku Yamahata
- Re: [Xen-devel] Re: Next steps with pv_ops for Xen, Gerd Hoffmann
- Re: [Xen-devel] Re: Next steps with pv_ops for Xen, Jeremy Fitzhardinge
- Re: [Xen-devel] Re: Next steps with pv_ops for Xen, Derek Murray
- Re: [Xen-devel] Re: Next steps with pv_ops for Xen, Jeremy Fitzhardinge
- Re: [Xen-devel] Re: Next steps with pv_ops for Xen, Geoffrey Lefebvre
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