Re: [Xen-devel] [PATCH] xen/arm64: do not (incorrectly) limit size of xenheap

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

On Fri, 2015-09-04 at 14:16 +0100, Wei Liu wrote:
> On Fri, Sep 04, 2015 at 01:57:00PM +0100, Julien Grall wrote:
> > The commit 88e3ed61642bb393458acc7a9bd2f96edc337190 "x86/NUMA: make
> > init_node_heap() respect Xen heap limit" breaks boot on the arm64 board
> > X-Gene.
> > 
> > The xenheap bits variable is used to know the last RAM MFN always 
> > mapped
> > in Xen virtual memory. If the value is 0, it means that all the memory 
> > is
> > always mapped in Xen virtual memory.
> > 
> > On X-gene the RAM bank resides above 128GB and last xenheap MFN is
> > 0x4400000. With the new way to calculate the number of bits, 
> > xenheap_bits
> > will be equal to 38 bits. This will result to hide all the RAM and the
> > impossibility to allocate xenheap memory.
> > 
> > Given that aarch64 have always all the memory mapped in Xen virtual
> > memory, it's not necessary to call xenheap_max_mfn which set the number
> > of bits.
> > 
> > Suggested-by: Jan Beulich <jbeulich@xxxxxxxx>
> > Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx>
> > Acked-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
> > 
> 
> Release-acked-by: Wei Liu <wei.liu2@xxxxxxxxxx>

Applied.


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