[Xen-devel] non-contiguous allocations

[Olaf Hering <olaf@xxxxxxxxx>]

On Fri, Apr 01, George Dunlap wrote:

> On Wed, 2011-03-30 at 19:04 +0100, Olaf Hering wrote:
> > Using the u16 means each cpu could in theory use up to 256MB as trace
> > buffer. However such a large allocation will currently fail on x86 due
> > to the MAX_ORDER limit.
> 
> FWIW, I don't believe that there's any reason the allocations have to be
> contiguous any more.  I kept them contiguous to minimize the changes to
> the moving parts near a release.  But the new system has been pretty
> well tested now, so I think looking at non-contiguous allocations may be
> worthwhile.

George,

how do I allocate a few mfns and give them a virtual address?
I dont find a malloc like interface to allocate random pages.

Olaf

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