linux-kernel - Re: [patch 3/3] x86,apic: limit apic dumping, introduce show

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Date:	Wed, 14 Oct 2009 19:56:16 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Cyrill Gorcunov <gorcunov@...il.com>
Cc:	x86@...nel.org, yinghai@...nel.org, macro@...ux-mips.org,
	linux-kernel@...r.kernel.org
Subject: Re: [patch 3/3] x86,apic: limit apic dumping, introduce show_lapic
	setup option


btw., i'm getting this warning on a test-box:

[    0.290000] Initializing cgroup subsys net_cls
[    0.300000] ------------[ cut here ]------------
[    0.300000] WARNING: at arch/x86/kernel/apic/apic_noop.c:42 warn_apic_enabled+0x5d/0x80()
[    0.310000] Hardware name: System Product Name
[    0.320000] APIC: Called for NOOP operation with apic enabled
[    0.320000] Modules linked in:
[    0.330000] Pid: 0, comm: swapper Not tainted 2.6.32-rc4-tip-01511-g59b4c9d-dirty #1741
[    0.330000] Call Trace:
[    0.340000]  [<79061fa5>] warn_slowpath_common+0x65/0xa0
[    0.340000]  [<7903d84d>] ? warn_apic_enabled+0x5d/0x80
[    0.350000]  [<7906203f>] warn_slowpath_fmt+0x2f/0x50
[    0.350000]  [<7903d84d>] warn_apic_enabled+0x5d/0x80
[    0.360000]  [<7903da96>] noop_default_phys_pkg_id+0x16/0x30
[    0.360000]  [<79af1514>] generic_identify+0xa3/0x176
[    0.370000]  [<79af165f>] identify_cpu+0x78/0x1fd
[    0.370000]  [<792c8d7d>] ? __init_rwsem+0x4d/0x70
[    0.380000]  [<79abcb54>] identify_boot_cpu+0xd/0x1e
[    0.380000]  [<79abcdae>] check_bugs+0x16/0xe5
[    0.390000]  [<79ab6b39>] start_kernel+0x31d/0x342
[    0.390000]  [<79ab60aa>] i386_start_kernel+0xaa/0xc2
[    0.400000] ---[ end trace a7919e7f17c0a725 ]---
[    0.400000] Checking 'hlt' instruction... OK.
[    0.440000] SMP alternatives: switching to UP code
[    0.450000] debug: unmapping init memory 79c7a000..79c80000

noop_default_phys_pkg_id() should return 0 i guess, and not generate a 
warning?

	Ingo
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