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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 17:17:23 +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 09:18:00 -0800 |
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<C37C894B.1970F%Keir.Fraser@xxxxxxxxxxxx> |
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Keir Fraser wrote:
Actually I'm not so sure now. Presumably you add VM_PFNMAP to make
vm_normal_page() return NULL? But actually I would expect pte_pfn() to
return max_mapnr because the mapped page is not a local page. And that
should cause vm_normal_page() to return NULL always, regardless of whether
you assert VM_PFNMAP. Is gntdev being used to grant-and-map local pages in
the test that causes the crash?
That's right (gntdev is being used to map (but not grant) a local page).
The test case creates a virtual block device in Dom0, and attempts to
map its ring buffer in a user-space daemon in Dom0. Therefore pte_pfn
succeeds.
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, 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, 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
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