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

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Message-ID: <20140224201943.GA4397@pd.tnic>
Date:	Mon, 24 Feb 2014 21:19:43 +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,
	Jiri Kosina <jkosina@...e.cz>
Subject: Re: Info: mapping multiple BARs. Your kernel is fine.

Btw,

I don't know whether the following observation is related or not, but it
so happens that after resume from suspend-to-disk, I see the booting up
of the resume kernel on the console but when it is time for the original
kernel to take over and switch to graphics, the screen remains black but
the machine is responsive over the network.

And this doesn't happen on every resume but only sporadically.

And yep, -rc3 was fine.

On Mon, Feb 24, 2014 at 05:24:00PM +0100, Borislav Petkov wrote:
> 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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