Messages in this thread | | | From | Marc-Christian Petersen <> | Subject | Re: UP local APIC is deadly on SMP Athlon | Date | Fri, 21 Feb 2003 22:41:23 +0100 |
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On Friday 21 February 2003 21:42, Ion Badulescu wrote:
Hi Ion,
> And this is what I found: eliminating two lines from > APIC_init_uniprocessor() makes the problem go away. > diff -urNX diff_kernel_excludes linux-2.4.10-pre12/arch/i386/kernel/apic.c > linux-2.4.10-pre11++/arch/i386/kernel/apic.c --- > linux-2.4.10-pre12/arch/i386/kernel/apic.c Wed Feb 19 23:53:15 2003 +++ > linux-2.4.10-pre11++/arch/i386/kernel/apic.c Fri Feb 21 15:37:06 2003 @@ > -1087,9 +1087,6 @@ > > connect_bsp_APIC(); > > - phys_cpu_present_map = 1; > - apic_write_around(APIC_ID, boot_cpu_id); > - > apic_pm_init2(); > > setup_local_APIC(); > > [patch against 2.4.10-pre12, but 2.4.21-pre4 is reasonably similar] Don't do this. I am pretty sure it will break all Intels. I still cannot understand why this fixes your AMD Athlon problem.
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