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. -- Catalin
