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Re: [Xen-devel] Baffled by multipage_allocation_permitted()
| To: | Dave McCracken <dcm@xxxxxxxx>, Xen Developers List <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] Baffled by multipage_allocation_permitted() |
| From: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
| Date: | Mon, 15 Jun 2009 22:57:03 +0100 |
| Cc: | |
| Delivery-date: | Mon, 15 Jun 2009 14:57:41 -0700 |
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| In-reply-to: | <200906151644.51978.dcm@xxxxxxxx> |
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| Thread-index: | AcnuAplH4th1Rva8SbCyk1/mp0sArwAAZ3qW |
| Thread-topic: | [Xen-devel] Baffled by multipage_allocation_permitted() |
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On 15/06/2009 22:44, "Dave McCracken" <dcm@xxxxxxxx> wrote: > #define multipage_allocation_permitted(d) \ > (!rangeset_is_empty((d)->iomem_caps) || \ > !rangeset_is_empty((d)->arch.ioport_caps)) > > I had never tracked down the significance of this macro since it didn't appear > to be an issue. Now it's suddenly denying me the ability to work in 2M pages. > > What is this macro trying to achieve? Why is it necessary? Is there any > compelling reason we can't just remove it and allow multipage allocations from > any domain? We can just get rid of it I think. There are arguably worse other things we already allow, like any guest can allocate low memory by specifying a small value of XENMEMF_address_bits(). -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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