Re: [Xen-devel] patches pending acks (or naks)

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 11.12.14 at 16:18, <konrad.wilk@xxxxxxxxxx> wrote:
> On December 11, 2014 6:39:07 AM EST, Jan Beulich <JBeulich@xxxxxxxx> wrote:
>>Either
>>http://lists.xenproject.org/archives/html/xen-devel/2014-12/msg00260.html 
>>or (my preference)
>>http://lists.xenproject.org/archives/html/xen-devel/2014-12/msg01054.html 
>>
> 
> Daniel's patch fixes the case for EFI map or large CPU count (to a certain 
> extent). Jan's patch only fixes it for large CPU count. The memmap can be 
> huge on small CPU count machines.

The EFI memory map gets printed much later than when the ring
buffer gets set up with "conring_size=" present.

> A proper fix would be to automatically adjust based on memmap and CPU but 
> that could be too complex.

The problem isn't the complexity, but the chicken-and-egg problem
as far as CPU count is concerned. The memory map size would be
known early enough.

Jan


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