Messages in this thread |  | | Date | Fri, 23 Sep 2011 12:18:48 +0100 | | From | David Vrabel <> | | Subject | Re: [Xen-devel] Re: [PATCH 0/6] xen: don't call vmalloc_sync_all() when mapping foreign pages |
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On 22/09/11 22:19, Jeremy Fitzhardinge wrote: > > But I'd be happier pretending that vmalloc_sync_* just doesn't exist, > and deal with it at the hypercall level - in the short term, by just > making sure that the callers touch all those pages before passing them > into the hypercall.
I don't think you can access the pages at the addresses allocated with alloc_vm_area() because the pages don't exist yet and there's a check of pte_present() in vmalloc_fault() and I think an Oops will be reported.
David
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