Muli Ben-Yehuda <[email protected]> writes:
> On Fri, Oct 06, 2006 at 05:42:40PM -0600, Eric W. Biederman wrote:
>
>> If I read your bootlog right. You have logical cpus, but only two
>> sockets, and I think only two cores. The other two logical cpus
>> being hyperthreaded.
>
> Yes, 2 sockets each of which is HT. Here's a /proc/cpuinfo from a
> distro kernel:
Ok. From looking at an individual case the ioapic is programmed
correctly and I don't see a reason the local apic would be programmed
incorrectly. However logical delivery mode and lowest priority
delivery mode are enabled. So we are asking the interrupt delivery
subsystem to choose a cpu to deliver the interrupt to and then are not
giving the cpu any choice. So we may be confusing things.
Can you try CONFIG_CPU_HOTPLUG? That will force genapic to be set
to genapic_physflat instead of genapic_flat.
I am hoping that by running the apics in a different delivery mode
that explicitly says just deliver this interrupt to this cpu we
will avoid the problem you are seeing.
If genapic_physflat works we will have to decide what to do about
genapic_flat.
Thanks,
Eric
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