From mboxrd@z Thu Jan  1 00:00:00 1970
From: Marcelo Tosatti <mtosatti@redhat.com>
Subject: Re: WARNING: at arch/x86/kernel/apic/apic.c:1238
 setup_local_APIC+0x169/0x24b()
Date: Tue, 24 Aug 2010 10:22:00 -0300
Message-ID: <20100824132159.GD26660@amt.cnet>
References: <AANLkTimEmkY_T-sd8JMhYUrstnqmHroWrVfus=2GDd+4@mail.gmail.com>
 <20100823212158.GD32690@amt.cnet>
 <AANLkTimHzrUhDiUcNvSg3tKBKEJ_XN3q0sywc2eWNb8f@mail.gmail.com>
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Cc: x86@kernel.org, kvm@vger.kernel.org
To: Tharindu Rukshan Bamunuarachchi <btharindu@gmail.com>
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> [=A0=A0=A0 0.000000] NR_IRQS:4352 nr_irqs:512
> [=A0=A0=A0 0.000000] Console: colour VGA+ 80x25
> [=A0=A0=A0 0.000000] console [tty0] enabled
> [=A0=A0=A0 0.000000] ODEBUG: 0 of 0 active objects replaced
> [=A0=A0=A0 0.000000] Fast TSC calibration failed
> [=A0=A0=A0 0.000000] TSC: Unable to calibrate against PIT
> [=A0=A0=A0 0.000000] TSC: No reference (HPET/PMTIMER) available
> [=A0=A0=A0 0.000000] Marking TSC unstable due to could not calculate =
TSC khz
> [=A0=A0=A0 0.052000] Calibrating delay loop... 3932.16 BogoMIPS (lpj=3D=
7864320)

Enabling CONFIG_KVM_GUEST and CONFIG_KVM_CLOCK should fix the warning.

> [=A0=A0=A0 0.148000] pid_max: default: 32768 minimum: 301
> [=A0=A0=A0 0.148000] Dentry cache hash table entries: 65536 (order: 7=
, 524288 bytes)
> [=A0=A0=A0 0.152000] Inode-cache hash table entries: 32768 (order: 6,=
 262144 bytes)
> [=A0=A0=A0 0.152000] Mount-cache hash table entries: 256
> [=A0=A0=A0 0.152000] Performance Events: unsupported p6 CPU model 2 n=
o PMU
> driver, software events only.
> [=A0=A0=A0 0.160000] Freeing SMP alternatives: 12k freed
> [=A0=A0=A0 0.160000] Setting APIC routing to flat
> [=A0=A0=A0 0.164000] ------------[ cut here ]------------
> [=A0=A0=A0 0.164000] WARNING: at arch/x86/kernel/apic/apic.c:1238
> setup_local_APIC+0x169/0x24b()
> [=A0=A0=A0 0.164000] Hardware name: Bochs
> [=A0=A0=A0 0.168000] Pid: 1, comm: swapper Not tainted 2.6.36-rc1-tin=
ux+ #89
> [=A0=A0=A0 0.168000] Call Trace:
> [=A0=A0=A0 0.168000]=A0 [<ffffffff8103e0a5>] warn_slowpath_common+0x7=
5/0xb0
> [=A0=A0=A0 0.168000]=A0 [<ffffffff8103e1a5>] warn_slowpath_null+0x15/=
0x20
> [=A0=A0=A0 0.172000]=A0 [<ffffffff816b708a>] setup_local_APIC+0x169/0=
x24b
> [=A0=A0=A0 0.172000]=A0 [<ffffffff81694f6f>] native_smp_prepare_cpus+=
0x322/0x3ff
> [=A0=A0=A0 0.172000]=A0 [<ffffffff8168fce5>] kernel_init+0x57/0x1bd
> [=A0=A0=A0 0.172000]=A0 [<ffffffff81003b84>] kernel_thread_helper+0x4=
/0x10
> [=A0=A0=A0 0.176000]=A0 [<ffffffff8168fc8e>] ? kernel_init+0x0/0x1bd
> [=A0=A0=A0 0.176000]=A0 [<ffffffff81003b80>] ? kernel_thread_helper+0=
x0/0x10
> [=A0=A0=A0 0.176000] ---[ end trace 4eaa2a86a8e2da22 ]---
> [=A0=A0=A0 0.180000]=A0=A0 alloc irq_desc for 33 on node 0
> [=A0=A0=A0 0.180000]=A0=A0 alloc kstat_irqs on node 0
> [=A0=A0=A0 0.180000]=A0=A0 alloc irq_desc for 35 on node 0
> [=A0=A0=A0 0.180000]=A0=A0 alloc kstat_irqs on node 0
> [=A0=A0=A0 0.180000] ..TIMER: vector=3D0x30 apic1=3D0 pin1=3D2 apic2=3D=
-1 pin2=3D-1
> [=A0=A0=A0 0.220000] CPU0: Intel QEMU Virtual CPU version 0.12.3 step=
ping 03
> [=A0=A0=A0 0.340000] NMI watchdog failed to create perf event on cpu0=
:
> ffffffffffffffed