Re: [Xen-devel] [PATCH v5 10/28] xsplice: Implement payload loading

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 31.03.16 at 23:26, <konrad@xxxxxxxxxx> wrote:
>>  Also - how well will this O(n^2) lookup work once there are enough
>> payloads? I think this calls for the alternative vmap() extension I've
>> been suggesting earlier.
> 
> Could you elaborate on the vmap extension a bit please?
> 
> Your earlier email seems to say: drop the vmap API and just 
> allocate the underlaying pages yourself.

Actually I had also said in that earlier mail: "If, otoh, you left that
VA management to (an extended version of) vmap(), by e.g.
allowing the caller to request allocation from a different VA range
(much like iirc x86-64 Linux handles its modules address range
allocation), things would be different. After all the VA
management is the important part here, while the backing
memory allocation is just a trivial auxiliary operation."

I.e. elaboration here really just consists of the referral to the
respective Linux approach.

Jan


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