Server product kernel requirements

[Josh Boyer]

On Wed, Oct 30, 2013 at 7:25 PM, Prarit Bhargava <prarit at redhat.com> wrote:
> On 10/30/2013 02:10 PM, Simo Sorce wrote:
>> On Wed, 2013-10-30 at 10:51 -0700, David Strauss wrote:
>>> On Wed, Oct 30, 2013 at 10:09 AM, Josh Boyer <jwboyer at fedoraproject.org> wrote:
>>>> Massive 4096 multi-cored CPU machines with terabytes of DRAM and
>>>> petabytes of storage, or more commodity style hardware used in
>>>> heterogeneous environments, etc.
>>>
>>> The latter. We'd want a separate HPC group for 512+ core machines.
>>
>> Or simply, sites so big can care for their own kernel builds most
>> probably, or seek for commercial support.
>
> Why limit it so low?  If we're thinking about going big, well, GO BIG.
>
> Users of Fedora want to support these systems out-of-the-box so they can get an
> idea if their systems work.  Stopping at 512 just seems too low these days.
>
> We're talking about saving a very small amount of memory by not going to 4096 ..

Remind me how much again?  IIRC, it was around 2MB additional runtime
overhead to set MAX_CPUS to that, right?  That's very small on
servers, not so small on cloud.

josh