Re: latest -git: WARNING: at arch/x86/kernel/ipi.c:123 send_IPI_mask_bitmask+0xc3/0xe0() | KernelTrap

Re: latest -git: WARNING: at arch/x86/kernel/ipi.c:123 send_IPI_mask_bitmask+0xc3/0xe0()

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From: H. Peter Anvin

Subject: Re: latest -git: WARNING: at arch/x86/kernel/ipi.c:123 send_IPI_mask_bitmask+0xc3/0xe0()

Date: Sunday, August 24, 2008 - 9:43 am

Vegard Nossum wrote:
quoted text> 
> Hm.
> 
> Kernel fails to detect cpu1 at all.
> 
> I am currently unsure of whether it's your patch or not. But it's the
> same config that I've been booting for ages (and I copy it over for
> each new kernel version I check out).
> 
> Processor #0 (Bootup-CPU)
> I/O APIC #2 Version 32 at 0xFEC00000.
> Enabling APIC mode:  Flat.  Using 1 I/O APICs
> Processors: 1
> SMP: Allowing 1 CPUs, 0 hotplug CPUs
> mapped APIC to ffffb000 (fee00000)
> mapped IOAPIC to ffffa000 (fec00000)
> Allocating PCI resources starting at 50000000 (gap: 40000000:bee00000)
> PERCPU: Allocating 1221764 bytes of per cpu data
> NR_CPUS: 7, nr_cpu_ids: 1, nr_node_ids 1
> 
> I really don't get it. Is this something that can be caused by your
> patch _at all_ ?
> 

Well, if smp_call_function_single() is called during the CPU up 
sequence, without the CPU having been added to the online mask, then 
yes, it could.  The most likely place would be from a notifier.

That makes it ugly.  Need to track down the reason.

	-hpa
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Messages in current thread:

latest -git: WARNING: at arch/x86/kernel/ipi.c:123 send_IP ..., Vegard Nossum, (Tue Aug 19, 12:51 pm)

Re: latest -git: WARNING: at arch/x86/kernel/ipi.c:123 sen ..., Andi Kleen, (Tue Aug 19, 6:39 pm)

Re: latest -git: WARNING: at arch/x86/kernel/ipi.c:123 sen ..., Vegard Nossum, (Tue Aug 19, 11:26 pm)

Re: latest -git: WARNING: at arch/x86/kernel/ipi.c:123 sen ..., Dave Jones, (Thu Aug 21, 5:36 pm)

Re: latest -git: WARNING: at arch/x86/kernel/ipi.c:123 sen ..., H. Peter Anvin, (Thu Aug 21, 7:13 pm)

Re: latest -git: WARNING: at arch/x86/kernel/ipi.c:123 sen ..., Andi Kleen, (Thu Aug 21, 7:28 pm)

Re: latest -git: WARNING: at arch/x86/kernel/ipi.c:123 sen ..., H. Peter Anvin, (Thu Aug 21, 11:24 pm)

Re: latest -git: WARNING: at arch/x86/kernel/ipi.c:123 sen ..., Andi Kleen, (Fri Aug 22, 2:35 am)

Re: latest -git: WARNING: at arch/x86/kernel/ipi.c:123 sen ..., adobriyan, (Fri Aug 22, 4:13 am)

Re: latest -git: WARNING: at arch/x86/kernel/ipi.c:123 sen ..., H. Peter Anvin, (Fri Aug 22, 9:41 am)

Re: latest -git: WARNING: at arch/x86/kernel/ipi.c:123 sen ..., Jeremy Fitzhardinge, (Fri Aug 22, 11:42 pm)

Re: latest -git: WARNING: at arch/x86/kernel/ipi.c:123 sen ..., H. Peter Anvin, (Fri Aug 22, 11:44 pm)

Re: latest -git: WARNING: at arch/x86/kernel/ipi.c:123 sen ..., Vegard Nossum, (Sun Aug 24, 2:20 am)

Re: latest -git: WARNING: at arch/x86/kernel/ipi.c:123 sen ..., H. Peter Anvin, (Sun Aug 24, 9:43 am)

Re: latest -git: WARNING: at arch/x86/kernel/ipi.c:123 sen ..., H. Peter Anvin, (Sun Aug 24, 10:17 am)

Re: latest -git: WARNING: at arch/x86/kernel/ipi.c:123 sen ..., Vegard Nossum, (Sun Aug 24, 10:22 am)

Re: latest -git: WARNING: at arch/x86/kernel/ipi.c:123 sen ..., Vegard Nossum, (Sun Aug 24, 10:45 am)

Re: latest -git: WARNING: at arch/x86/kernel/ipi.c:123 sen ..., H. Peter Anvin, (Sun Aug 24, 10:59 am)

Re: latest -git: WARNING: at arch/x86/kernel/ipi.c:123 sen ..., Dave Jones, (Sun Aug 24, 11:13 am)

Re: latest -git: WARNING: at arch/x86/kernel/ipi.c:123 sen ..., Vegard Nossum, (Mon Aug 25, 11:31 am)

Re: latest -git: WARNING: at arch/x86/kernel/ipi.c:123 sen ..., Andi Kleen, (Mon Aug 25, 11:36 am)

Re: latest -git: WARNING: at arch/x86/kernel/ipi.c:123 sen ..., Dave Jones, (Mon Aug 25, 11:38 am)

Re: latest -git: WARNING: at arch/x86/kernel/ipi.c:123 sen ..., Dave Jones, (Mon Aug 25, 11:54 am)

Re: latest -git: WARNING: at arch/x86/kernel/ipi.c:123 sen ..., H. Peter Anvin, (Mon Aug 25, 12:08 pm)

Re: latest -git: WARNING: at arch/x86/kernel/ipi.c:123 sen ..., Dave Jones, (Mon Aug 25, 12:13 pm)

Re: latest -git: WARNING: at arch/x86/kernel/ipi.c:123 sen ..., Andi Kleen, (Mon Aug 25, 12:39 pm)

Re: latest -git: WARNING: at arch/x86/kernel/ipi.c:123 sen ..., Dave Jones, (Mon Aug 25, 12:50 pm)

Re: latest -git: WARNING: at arch/x86/kernel/ipi.c:123 sen ..., Andi Kleen, (Mon Aug 25, 1:36 pm)

Re: latest -git: WARNING: at arch/x86/kernel/ipi.c:123 sen ..., Dave Jones, (Mon Aug 25, 1:47 pm)

Re: latest -git: WARNING: at arch/x86/kernel/ipi.c:123 sen ..., Arjan van de Ven, (Mon Aug 25, 2:24 pm)

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