linux-kernel - Info: mapping multiple BARs. Your kernel is fine.

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Message-ID: <20140224162400.GE16457@pd.tnic>
Date:	Mon, 24 Feb 2014 17:24:00 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	lkml <linux-kernel@...r.kernel.org>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	x86@...nel.org, Daniel Vetter <daniel.vetter@...ll.ch>,
	Jani Nikula <jani.nikula@...ux.intel.com>,
	David Airlie <airlied@...ux.ie>,
	intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org
Subject: Info: mapping multiple BARs. Your kernel is fine.

This started happening this morning after booting -rc4+tip, let's
add *everybody* to CC :-)

We have intel_uncore_init, snb_uncore_imc_init_box, uncore_pci_probe and
other goodies on the stack.

...
[    0.488998] software IO TLB [mem 0xcac30000-0xcec30000] (64MB) mapped at [ffff8800cac30000-ffff8800cec2ffff]
[    0.489975] resource map sanity check conflict: 0xfed10000 0xfed15fff 0xfed10000 0xfed13fff pnp 00:01
[    0.490079] ------------[ cut here ]------------
[    0.490204] WARNING: CPU: 2 PID: 1 at arch/x86/mm/ioremap.c:171 __ioremap_caller+0x372/0x380()
[    0.490306] Info: mapping multiple BARs. Your kernel is fine.
[    0.490371] Modules linked in:
[    0.490558] CPU: 2 PID: 1 Comm: swapper/0 Not tainted 3.14.0-rc4+ #1
[    0.490642] Hardware name: LENOVO 2320CTO/2320CTO, BIOS G2ET86WW (2.06 ) 11/13/2012
[    0.490742]  00000000000000ab ffff880213d01ad8 ffffffff816112e3 0000000000000006
[    0.491032]  ffff880213d01b28 ffff880213d01b18 ffffffff8104e9bc ffff880213d01b08
[    0.491343]  ffffc90000c58000 00000000fed10000 00000000fed10000 0000000000006000
[    0.491631] Call Trace:
[    0.493337]  [<ffffffff816112e3>] dump_stack+0x4f/0x7c
[    0.493420]  [<ffffffff8104e9bc>] warn_slowpath_common+0x8c/0xc0
[    0.493503]  [<ffffffff8104eaa6>] warn_slowpath_fmt+0x46/0x50
[    0.493588]  [<ffffffff8103f1e2>] __ioremap_caller+0x372/0x380
[    0.493674]  [<ffffffff810211a2>] ? snb_uncore_imc_init_box+0x62/0x90
[    0.493761]  [<ffffffff8103f247>] ioremap_nocache+0x17/0x20
[    0.493846]  [<ffffffff810211a2>] snb_uncore_imc_init_box+0x62/0x90
[    0.493933]  [<ffffffff81022925>] uncore_pci_probe+0xe5/0x1e0
[    0.494020]  [<ffffffff812d487e>] local_pci_probe+0x4e/0xa0
[    0.494104]  [<ffffffff81418a59>] ? get_device+0x19/0x20
[    0.494213]  [<ffffffff812d5cd1>] pci_device_probe+0xe1/0x130
[    0.494300]  [<ffffffff8141d3cb>] driver_probe_device+0x7b/0x240
[    0.494385]  [<ffffffff8141d63b>] __driver_attach+0xab/0xb0
[    0.494469]  [<ffffffff8141d590>] ? driver_probe_device+0x240/0x240
[    0.494551]  [<ffffffff8141b71e>] bus_for_each_dev+0x5e/0x90
[    0.494634]  [<ffffffff8141cede>] driver_attach+0x1e/0x20
[    0.494718]  [<ffffffff8141ca57>] bus_add_driver+0x117/0x230
[    0.494802]  [<ffffffff8141dd34>] driver_register+0x64/0xf0
[    0.494884]  [<ffffffff812d4c14>] __pci_register_driver+0x64/0x70
[    0.494972]  [<ffffffff81d0319b>] ? uncore_types_init+0x19c/0x19c
[    0.495056]  [<ffffffff81d03312>] intel_uncore_init+0x177/0x41c
[    0.495155]  [<ffffffff81d0319b>] ? uncore_types_init+0x19c/0x19c
[    0.495242]  [<ffffffff8100029e>] do_one_initcall+0x4e/0x170
[    0.495326]  [<ffffffff81071100>] ? parse_args+0x60/0x360
[    0.495411]  [<ffffffff81cfbfb8>] kernel_init_freeable+0x106/0x19a
[    0.495497]  [<ffffffff81cfb83b>] ? do_early_param+0x86/0x86
[    0.495582]  [<ffffffff81607ef0>] ? rest_init+0xd0/0xd0
[    0.495666]  [<ffffffff81607efe>] kernel_init+0xe/0xf0
[    0.495749]  [<ffffffff81621f6c>] ret_from_fork+0x7c/0xb0
[    0.495831]  [<ffffffff81607ef0>] ? rest_init+0xd0/0xd0
[    0.495921] ---[ end trace 428f365c054d9a01 ]---
[    0.496196] RAPL PMU detected, hw unit 2^-16 Joules, API unit is 2^-32 Joules, 3 fixed counters 163840 ms ovfl timer
[    0.498598] futex hash table entries: 1024 (order: 5, 131072 bytes)
[    0.498833] audit: initializing netlink subsys (disabled)
[    0.499024] audit: type=2000 audit(1393259866.477:1): initialized
...

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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