Messages in this thread Patch in this message | | | Date | Sat, 1 Mar 2003 01:32:33 +0100 (MET) | From | Mikael Pettersson <> | Subject | Re: Bug in APIC on 2.4.20 kernel |
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On 01 Mar 2003 00:18:46 +0100, "JP Pozzi izzop.org" wrote: >I found a problem with the APIC management in the 2.4.20 kernel. > >My system is (was) a bi-processor one : > >MSI K7D Master (BIOS V 1.1) with 2 ATHLON MP 1800+ > >The facts : > >1) The 2.4.20 kernel was OK on my system with the 2 processors and a >home made SMP kernel. > >2) One processor was broken/defective. > >3) No boot was possible with only on processor on the card with a loop >while booting saying endlessly : "APIC 04(04)" > >I try to recompile the 2.4.20 kernel with no SMP support the problem was >the same, I try gcc2.95 and gcc3 without any success.
Known problem. It has been discussed extensively on LKML recently. Apply the patch below.
/Mikael
diff -ruN linux-2.4.21-pre5/arch/i386/kernel/apic.c linux-2.4.21-pre5.apic-fixes/arch/i386/kernel/apic.c --- linux-2.4.21-pre5/arch/i386/kernel/apic.c 2003-02-27 12:58:55.000000000 +0100 +++ linux-2.4.21-pre5.apic-fixes/arch/i386/kernel/apic.c 2003-02-27 13:05:28.000000000 +0100 @@ -649,7 +649,6 @@ } set_bit(X86_FEATURE_APIC, &boot_cpu_data.x86_capability); mp_lapic_addr = APIC_DEFAULT_PHYS_BASE; - boot_cpu_physical_apicid = 0; if (nmi_watchdog != NMI_NONE) nmi_watchdog = NMI_LOCAL_APIC; @@ -1169,8 +1168,7 @@ connect_bsp_APIC(); - phys_cpu_present_map = 1; - apic_write_around(APIC_ID, boot_cpu_physical_apicid); + phys_cpu_present_map = 1 << boot_cpu_physical_apicid; apic_pm_init2(); - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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