On Mon, Jan 11, 2021 at 06:25:27PM +0000, Catalin Marinas wrote:
On Mon, Jan 11, 2021 at 10:03:18AM -0800, Randy Dunlap wrote:
On 1/11/21 9:57 AM, Vanshidhar Konda wrote:
> On Mon, Jan 11, 2021 at 10:56:36AM +0000, Will Deacon wrote:
>> On Sat, Jan 09, 2021 at 09:36:15PM -0800, vanshiko...@os.amperecomputing.com
wrote:
>>> From: Vanshidhar Konda <vanshiko...@os.amperecomputing.com>
>>>
>>> Increase the default value of NR_CPUS to 512 from 256. This will
>>> enable the defconfig kernel to support platforms that have upto
>>> 512 cores.
>>
>> Do we already support such a platform, and what is it? I'm fine with bumping.
>> the number, it's just nice to be able to say specifically _why_ we're dong
>> it.
>
> I'm not aware of any publicly available systems that run into the 256
> core limitation. At Ampere we have internal systems that would benefit
> from this change as they support more than 256 cores.
But what does that have to do with the default value?
Do you expect to run defconfig kernels?
I don't ever expect that.
We still aim for the arm64 defconfig to run on all supported SoCs, even
if not optimally. Distros indeed tweak the config to their needs.
Would "all supported SoCs" mean only SoCs that are currently available
publicly? Could we include support for SoCs/systems in development but
to be available publicly in the next few years?
Thanks,
Vanshi
--
Catalin
