Hi Yinghai, Does this patch fix your issue? https://lkml.org/lkml/2012/5/9/183. I have encountered a similar issue on an IA64 platform and the patch above works around it. But the root cause is a BIOS bug that the order of CPUs in MADT table doesn't conform to the ACPI specification and the first CPU in MADT is not the BSP, which breaks some assumption of the booting code and causes the core dump. Thanks! On 05/11/2012 01:54 AM, Yinghai Lu wrote: > On Thu, May 10, 2012 at 10:44 AM, Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> wrote: >> On Thu, 2012-05-10 at 10:30 -0700, Yinghai Lu wrote: >>> not sure if this one or other is related.... >>> >>> got this from 8 socket Nehalem-ex box. >>> >>> [ 25.549259] mtrr_aps_init() done >>> [ 25.554298] ------------[ cut here ]------------ >>> [ 25.554549] WARNING: at kernel/sched/core.c:6086 build_sched_domains+0x1a9/0x2d0() >> >> oops,.. could you get me the output of: >> >> cat /sys/devices/system/node/node*/distance >> >> for that machine? I'll see if I can reproduce using numa=fake. > > [ 0.000000] ACPI: SLIT: nodes = 8 > [ 0.000000] 10 15 20 15 15 20 20 20 > [ 0.000000] 15 10 15 20 20 15 20 20 > [ 0.000000] 20 15 10 15 20 20 15 20 > [ 0.000000] 15 20 15 10 20 20 20 15 > [ 0.000000] 15 20 20 20 10 15 15 20 > [ 0.000000] 20 15 20 20 15 10 20 15 > [ 0.000000] 20 20 15 20 15 20 10 15 > [ 0.000000] 20 20 20 15 20 15 15 10 > > > [root@yhlu-pc2 ~]# cat /sys/devices/system/node/node*/distance > 10 15 15 20 15 20 20 20 > 15 10 20 15 20 15 20 20 > 15 20 10 15 20 20 15 20 > 20 15 15 10 20 20 20 15 > 15 20 20 20 10 15 20 15 > 20 15 20 20 15 10 15 20 > 20 20 15 20 20 15 10 15 > 20 20 20 15 15 20 15 10 > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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