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RE: [Xen-devel] Why gnttab_grant_foreign_access() can only grantaccess for one page?


  • To: "Randy Thelen" <rthelen@xxxxxxxxxx>, "Lily Huang" <ushuanglily@xxxxxxxxx>
  • From: "Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>
  • Date: Fri, 7 Jul 2006 10:55:57 +0100
  • Cc: xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • Delivery-date: Fri, 07 Jul 2006 02:56:26 -0700
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AcahjG2dp8XTING9R0WEbs1a0PnjrAAHttsg
  • Thread-topic: [Xen-devel] Why gnttab_grant_foreign_access() can only grantaccess for one page?

> Lily Huang wrote:
> 
> > THis seems to be less efficient. Why cannot we allow this function
> > to grant access for mulitiple pages just remap function?
> 
> With what frequency are multiple page grants requested?

You can always use multicalls for batches. In the current usage
scenarios, grant tables are not typically used to map machine contiguous
regions.

Ian

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