Am Fr., 3. Juli 2020 um 19:45 Uhr schrieb Peter Zijlstra <peterz@xxxxxxxxxxxxx>: > > On Fri, Jul 03, 2020 at 07:07:39PM +0200, Gabriel C wrote: > > > I boot all the boxes restricting the cores to the correct count on the > > command line. > > This, because you're right about the wasted memory. > > > Wasted resource or not, this is still a bug IMO. > > Yeah, but not one we can do much about I think. It is the BIOS saying it > wants more because it expects someone to come along and stick another > CPU in. > > Possible we could say that for single socket machines overprovisioning > is 'silly', but then, I've no idea how to detect that. You'll need to > find an ACPI person. I know the EPYC box got that problem too initially, it reported twice the cores and twice the sockets, but got fixed in some kernel versions. https://lkml.org/lkml/2018/5/20/102 I never really looked at how this is calculated but I still believe there is a bug somewhere.
