Messages in this thread | | | Date | Thu, 14 Aug 2008 11:07:37 +0200 | From | Ingo Molnar <> | Subject | Re: 2.6.27rc1 cannot boot more than 8CPUs |
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* Jeff Chua <jeff.chua.linux@gmail.com> wrote:
> On Thu, Aug 14, 2008 at 2:33 AM, Yinghai Lu <yhlu.kernel@gmail.com> wrote: > > >>>> > With 16 CPUs, it still hangs, but now the console is showing the > >>>> > errors as intended. > >>>> > ... but it is supposed to hang? > > > please check the attached patch. it should fix the new regression and > > will not hang. > > Ok, booted up and not hanged, but those messages below don't show up > anywhere. I've tested with CONFIG_NR_CPUS=16 and 8 as well. Just got 8 > cpus > > More than 8 CPUs detected - skipping them. > Use CONFIG_X86_GENERICARCH and CONFIG_X86_BIGSMP. > > # cat /sys/devices/system/cpu/possible > 0-7 > > CONFIG_X86_32=y > CONFIG_X86_PC=y > > > Looks like it's not going into this condition > + if (def_to_bigsmp && nr_cpu_ids > 8) { > > > Shall this be put back so that it'll show the message? > - if (def_to_bigsmp && apicid > 8) { > - printk(KERN_WARNING > - "More than 8 CPUs detected - skipping them.\n" > - "Use CONFIG_X86_GENERICARCH and CONFIG_X86_BIGSMP.\n"); > - }
could you post the full dmesg? And the modified patch that you've tested to both have 8 CPUs without bigsmp and which also shows the printk?
Ingo
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