* Bogus "APIC: NR_CPUS/possible_cpus limit of 4 reached" messages @ 2016-10-06 11:27 Markus Trippelsdorf 2016-10-06 11:48 ` One Thousand Gnomes 0 siblings, 1 reply; 6+ messages in thread From: Markus Trippelsdorf @ 2016-10-06 11:27 UTC (permalink / raw) To: Gu Zheng; +Cc: linux-acpi, linux-kernel On current trunk I get during boot: [ 0.000000] APIC: NR_CPUS/possible_cpus limit of 4 reached. Processor 4/0x84 ignored. [ 0.000000] APIC: NR_CPUS/possible_cpus limit of 4 reached. Processor 5/0x85 ignored. I don't think these messages make much sense on a 4-core machine. -- Markus ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Bogus "APIC: NR_CPUS/possible_cpus limit of 4 reached" messages 2016-10-06 11:27 Bogus "APIC: NR_CPUS/possible_cpus limit of 4 reached" messages Markus Trippelsdorf @ 2016-10-06 11:48 ` One Thousand Gnomes 2016-10-06 11:52 ` Markus Trippelsdorf 0 siblings, 1 reply; 6+ messages in thread From: One Thousand Gnomes @ 2016-10-06 11:48 UTC (permalink / raw) To: Markus Trippelsdorf; +Cc: Gu Zheng, linux-acpi, linux-kernel On Thu, 6 Oct 2016 13:27:37 +0200 Markus Trippelsdorf <markus@trippelsdorf.de> wrote: > On current trunk I get during boot: > > [ 0.000000] APIC: NR_CPUS/possible_cpus limit of 4 reached. Processor 4/0x84 ignored. > [ 0.000000] APIC: NR_CPUS/possible_cpus limit of 4 reached. Processor 5/0x85 ignored. > > I don't think these messages make much sense on a 4-core machine. > Four cores with or without hyperthreading ? Alan ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Bogus "APIC: NR_CPUS/possible_cpus limit of 4 reached" messages 2016-10-06 11:48 ` One Thousand Gnomes @ 2016-10-06 11:52 ` Markus Trippelsdorf 2016-10-07 13:26 ` Markus Trippelsdorf 0 siblings, 1 reply; 6+ messages in thread From: Markus Trippelsdorf @ 2016-10-06 11:52 UTC (permalink / raw) To: One Thousand Gnomes; +Cc: Gu Zheng, linux-acpi, linux-kernel On 2016.10.06 at 12:48 +0100, One Thousand Gnomes wrote: > On Thu, 6 Oct 2016 13:27:37 +0200 > Markus Trippelsdorf <markus@trippelsdorf.de> wrote: > > > On current trunk I get during boot: > > > > [ 0.000000] APIC: NR_CPUS/possible_cpus limit of 4 reached. Processor 4/0x84 ignored. > > [ 0.000000] APIC: NR_CPUS/possible_cpus limit of 4 reached. Processor 5/0x85 ignored. > > > > I don't think these messages make much sense on a 4-core machine. > > > > Four cores with or without hyperthreading ? Without. This is a rather old AMD machine (AMD Phenom II X4 955). -- Markus ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Bogus "APIC: NR_CPUS/possible_cpus limit of 4 reached" messages 2016-10-06 11:52 ` Markus Trippelsdorf @ 2016-10-07 13:26 ` Markus Trippelsdorf 2016-10-07 13:55 ` Thomas Gleixner 0 siblings, 1 reply; 6+ messages in thread From: Markus Trippelsdorf @ 2016-10-07 13:26 UTC (permalink / raw) To: One Thousand Gnomes Cc: Gu Zheng, linux-acpi, linux-kernel, Dou Liyang, Thomas Gleixner On 2016.10.06 at 13:52 +0200, Markus Trippelsdorf wrote: > On 2016.10.06 at 12:48 +0100, One Thousand Gnomes wrote: > > On Thu, 6 Oct 2016 13:27:37 +0200 > > Markus Trippelsdorf <markus@trippelsdorf.de> wrote: > > > > > On current trunk I get during boot: > > > > > > [ 0.000000] APIC: NR_CPUS/possible_cpus limit of 4 reached. Processor 4/0x84 ignored. > > > [ 0.000000] APIC: NR_CPUS/possible_cpus limit of 4 reached. Processor 5/0x85 ignored. > > > > > > I don't think these messages make much sense on a 4-core machine. > > > > > > > Four cores with or without hyperthreading ? > > Without. This is a rather old AMD machine (AMD Phenom II X4 955). CCing more people. -- Markus ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Bogus "APIC: NR_CPUS/possible_cpus limit of 4 reached" messages 2016-10-07 13:26 ` Markus Trippelsdorf @ 2016-10-07 13:55 ` Thomas Gleixner 2016-10-07 14:09 ` Markus Trippelsdorf 0 siblings, 1 reply; 6+ messages in thread From: Thomas Gleixner @ 2016-10-07 13:55 UTC (permalink / raw) To: Markus Trippelsdorf Cc: One Thousand Gnomes, Gu Zheng, linux-acpi, linux-kernel, Dou Liyang On Fri, 7 Oct 2016, Markus Trippelsdorf wrote: > On 2016.10.06 at 13:52 +0200, Markus Trippelsdorf wrote: > > On 2016.10.06 at 12:48 +0100, One Thousand Gnomes wrote: > > > On Thu, 6 Oct 2016 13:27:37 +0200 > > > Markus Trippelsdorf <markus@trippelsdorf.de> wrote: > > > > > > > On current trunk I get during boot: > > > > > > > > [ 0.000000] APIC: NR_CPUS/possible_cpus limit of 4 reached. Processor 4/0x84 ignored. > > > > [ 0.000000] APIC: NR_CPUS/possible_cpus limit of 4 reached. Processor 5/0x85 ignored. > > > > > > > > I don't think these messages make much sense on a 4-core machine. > > > > > > > > > > Four cores with or without hyperthreading ? > > > > Without. This is a rather old AMD machine (AMD Phenom II X4 955). That's due to the recent cpuid -> nodeid changes. The patch below should fix it. Thanks, tglx diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c index f266b8a92a9e..88c657b057e2 100644 --- a/arch/x86/kernel/apic/apic.c +++ b/arch/x86/kernel/apic/apic.c @@ -2128,9 +2128,11 @@ int __generic_processor_info(int apicid, int version, bool enabled) if (num_processors >= nr_cpu_ids) { int thiscpu = max + disabled_cpus; - pr_warning( - "APIC: NR_CPUS/possible_cpus limit of %i reached." - " Processor %d/0x%x ignored.\n", max, thiscpu, apicid); + if (enabled) { + pr_warning("APIC: NR_CPUS/possible_cpus limit of %i " + "reached. Processor %d/0x%x ignored.\n", + max, thiscpu, apicid); + } disabled_cpus++; return -EINVAL; ^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: Bogus "APIC: NR_CPUS/possible_cpus limit of 4 reached" messages 2016-10-07 13:55 ` Thomas Gleixner @ 2016-10-07 14:09 ` Markus Trippelsdorf 0 siblings, 0 replies; 6+ messages in thread From: Markus Trippelsdorf @ 2016-10-07 14:09 UTC (permalink / raw) To: Thomas Gleixner Cc: One Thousand Gnomes, Gu Zheng, linux-acpi, linux-kernel, Dou Liyang On 2016.10.07 at 15:55 +0200, Thomas Gleixner wrote: > On Fri, 7 Oct 2016, Markus Trippelsdorf wrote: > > On 2016.10.06 at 13:52 +0200, Markus Trippelsdorf wrote: > > > On 2016.10.06 at 12:48 +0100, One Thousand Gnomes wrote: > > > > On Thu, 6 Oct 2016 13:27:37 +0200 > > > > Markus Trippelsdorf <markus@trippelsdorf.de> wrote: > > > > > > > > > On current trunk I get during boot: > > > > > > > > > > [ 0.000000] APIC: NR_CPUS/possible_cpus limit of 4 reached. Processor 4/0x84 ignored. > > > > > [ 0.000000] APIC: NR_CPUS/possible_cpus limit of 4 reached. Processor 5/0x85 ignored. > > > > > > > > > > I don't think these messages make much sense on a 4-core machine. > > > > > > > > > > > > > Four cores with or without hyperthreading ? > > > > > > Without. This is a rather old AMD machine (AMD Phenom II X4 955). > > That's due to the recent cpuid -> nodeid changes. The patch below should > fix it. Indeed it does. Thanks for the quick fix. -- Markus ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2016-10-07 14:09 UTC | newest] Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2016-10-06 11:27 Bogus "APIC: NR_CPUS/possible_cpus limit of 4 reached" messages Markus Trippelsdorf 2016-10-06 11:48 ` One Thousand Gnomes 2016-10-06 11:52 ` Markus Trippelsdorf 2016-10-07 13:26 ` Markus Trippelsdorf 2016-10-07 13:55 ` Thomas Gleixner 2016-10-07 14:09 ` Markus Trippelsdorf
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