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SubjectRe: [BUG] 2.5.63: ESR killed my box!
On Wed, 26 Feb 2003 18:14:42 +1100, Rusty Russell <rusty@rustcorp.com.au> wrote:
> In message <9530000.1046238665@[10.10.2.4]> you write:
>> > SMP box, compiled for UP with CONFIG_LOCAL_APIC=y freezes on boot with
>> > last lines:
>> >
>> > POSIX conformance testing by UNIFIX
>> > masked ExtINT on CPU#0
>> > ESR value before enabling vector: 00000008
>> > [ Freeze here ]

I suspect the ESR is a red herring. The problem is that the kernel
assumes that the boot CPU is always CPU#0, and it also misprograms the
boot CPU's APIC.

What kind of SMP box is it (Intel/AMD)?

>> I put an esr_disable flag in there a while back ... does that workaround it?
>
> Yes. Hmm. Wonder if that helps my SMP wierness, too.

Does this patch (from Mikael) help? It fixed my problem on a dual AMD
box running a UP + local APIC kernel.

Ion

--
It is better to keep your mouth shut and be thought a fool,
than to open it and remove all doubt.
--------------------------

--- linux-2.4.21-pre4/arch/i386/kernel/apic.c.~1~ 2003-02-23 15:55:31.000000000 +0100
+++ linux-2.4.21-pre4/arch/i386/kernel/apic.c 2003-02-23 16:03:50.000000000 +0100
@@ -649,7 +649,7 @@
}
set_bit(X86_FEATURE_APIC, &boot_cpu_data.x86_capability);
mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
- boot_cpu_physical_apicid = 0;
+ boot_cpu_physical_apicid = -1U;
if (nmi_watchdog != NMI_NONE)
nmi_watchdog = NMI_LOCAL_APIC;

@@ -1169,8 +1169,8 @@

connect_bsp_APIC();

- phys_cpu_present_map = 1;
- apic_write_around(APIC_ID, boot_cpu_physical_apicid);
+ BUG_ON(boot_cpu_physical_apicid != GET_APIC_ID(apic_read(APIC_ID)));
+ phys_cpu_present_map = 1 << boot_cpu_physical_apicid;

apic_pm_init2();

-
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