On Tue, 1 Jun 2010 21:17:40 +0200 Giangiacomo Mariotti wrote: > On Tue, Jun 1, 2010 at 5:22 AM, Bill Davidsen <davidsen@xxxxxxx> wrote: > > Randy Dunlap wrote: > >> > >> On Tue, 1 Jun 2010 01:39:43 +0200 Giangiacomo Mariotti wrote: > >> > >>> Hi, I've recently noticed this line on the dmesg output(kernel 2.6.34): > >>> [ 0.000000] SLUB: Genslabs=14, HWalign=64, Order=0-3, MinObjects=0, > >>> CPUs=16, Nodes=1 > >>> > >>> My cpu is an I7 920, so it has 4 cores and there's hyperthreading > >>> enabled, so there are 8 logical cpus. Is this a bug? > >> > >> > >> No, it's just some boot/init time information. > >> > > I would consider it a bug to claim CPUs=xx when xx is something other than > > the number of cores or the number of SMT threads supported by the processor. > > Of course if /proc/cpuinfo shows four siblings per core or something > > exciting, then it's right and you have a CPU you can sell to gizmodo and > > tell them a drunk left on the bar. > > > So....is it a bug or not? Sorry, I think that I misread your report. It does look like misinformation. Let's cc Christoph Lameter & Pekka. > The point is, I guess(didn't actually look at the code), if that's > just the count of MAX number of cpus supported, which is a config time > define and then the actual count gets refined afterwards by slub > too(because I know that the rest of the kernel knows I've got 4 > cores/8 logical cpus) or not. Is that it? If this is not the case(that > is, it's not a static define used as a MAX value), then I can't see > what kind of boot/init time info it is. If it's a boot-time info, it > just means it's a _wrong_ boot-time info. --- ~Randy *** Remember to use Documentation/SubmitChecklist when testing your code *** -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href