Re: WARNING: CPU: 2 PID: 1 at arch/x86/mm/ioremap.c:171 __ioremap_caller+0x290/0x2fa()

[Fabio Coatti <fabio.coatti@gmail.com>]

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In data mercoledì 9 luglio 2014 11:54:21, Greg Kroah-Hartman ha scritto:

> Try cc:ing everyone on that patch, with the original information you
> provided, and the linux-kernel mailing list.  Those developers should be
> able to help you out properly.

Ok, here you can find the description of a problem that I'm experiencing on 
latest kernels, since 3.15.0.  (this report comes from 3.15.4)

lug 07 22:08:00 calvin kernel: resource map sanity check conflict: 0xfed10000 
0xfed15fff 0xfed10000 0xfed13fff reserved
lug 07 22:08:00 calvin kernel: ------------[ cut here ]------------
lug 07 22:08:00 calvin kernel: WARNING: CPU: 2 PID: 1 at 
arch/x86/mm/ioremap.c:171 __ioremap_caller+0x290/0x2fa()
lug 07 22:08:00 calvin kernel: Info: mapping multiple BARs. Your kernel is 
fine.
lug 07 22:08:00 calvin kernel: Modules linked in:
lug 07 22:08:00 calvin kernel: 
lug 07 22:08:00 calvin kernel: CPU: 2 PID: 1 Comm: swapper/0 Not tainted 
3.15.4 #1
lug 07 22:08:00 calvin kernel: Hardware name: Hewlett-Packard HP EliteBook 
Folio 9470m/18DF, BIOS 68IBD Ver. F.40 02/01/2013
lug 07 22:08:00 calvin kernel:  00009f90000000f7 ffffffff8175d44b ffff8802334fbc78 
ffffffff810af219
lug 07 22:08:00 calvin kernel:  ffffffff81028e43 ffffc90000070000 ffff8802334fbcc8 
00000000fed10000
lug 07 22:08:00 calvin kernel:  00000000fed16000 ffffffff810af275 ffffffff81991de2 
0000000000000018
lug 07 22:08:00 calvin kernel: Call Trace:
lug 07 22:08:00 calvin kernel:  [<ffffffff8175d44b>] ? dump_stack+0x49/0x6a
lug 07 22:08:00 calvin kernel:  [<ffffffff810af219>] ? 
warn_slowpath_common+0x6f/0x84
lug 07 22:08:00 calvin kernel:  [<ffffffff81028e43>] ? 
__ioremap_caller+0x290/0x2fa
lug 07 22:08:00 calvin kernel:  [<ffffffff810af275>] ? warn_slowpath_fmt+0x47/0x49
lug 07 22:08:00 calvin kernel:  [<ffffffff810b3932>] ? 
iomem_map_sanity_check+0xa5/0xb1
lug 07 22:08:00 calvin kernel:  [<ffffffff81028e43>] ? 
__ioremap_caller+0x290/0x2fa
lug 07 22:08:00 calvin kernel:  [<ffffffff81016316>] ? 
snb_uncore_imc_init_box+0x5c/0x7a
lug 07 22:08:00 calvin kernel:  [<ffffffff81017e8e>] ? 
uncore_pci_probe+0x100/0x168
lug 07 22:08:00 calvin kernel:  [<ffffffff813c8da9>] ? pci_device_probe+0x6c/0xcb
lug 07 22:08:00 calvin kernel:  [<ffffffff814e8f46>] ? 
driver_probe_device+0x9b/0x1ce
lug 07 22:08:00 calvin kernel:  [<ffffffff814e90fd>] ? __driver_attach+0x53/0x73
lug 07 22:08:00 calvin kernel:  [<ffffffff814e90aa>] ? __device_attach+0x31/0x31
lug 07 22:08:00 calvin kernel:  [<ffffffff814e7814>] ? bus_for_each_dev+0x6e/0x78
lug 07 22:08:00 calvin kernel:  [<ffffffff814e87f9>] ? bus_add_driver+0xfb/0x1c4
lug 07 22:08:00 calvin kernel:  [<ffffffff814e95f9>] ? driver_register+0x83/0xbb
lug 07 22:08:00 calvin kernel:  [<ffffffff81cb0fb6>] ? 
uncore_pmu_register+0xd1/0xd1
lug 07 22:08:00 calvin kernel:  [<ffffffff81cb1128>] ? 
intel_uncore_init+0x172/0x41e
lug 07 22:08:00 calvin kernel:  [<ffffffff81cb0fb6>] ? 
uncore_pmu_register+0xd1/0xd1
lug 07 22:08:00 calvin kernel:  [<ffffffff8100029f>] ? do_one_initcall+0x88/0x11c
lug 07 22:08:00 calvin kernel:  [<ffffffff810c41ac>] ? parse_args+0x17f/0x23b
lug 07 22:08:00 calvin kernel:  [<ffffffff81ca8e1f>] ? 
kernel_init_freeable+0x14f/0x1d1
lug 07 22:08:00 calvin kernel:  [<ffffffff81ca86b2>] ? do_early_param+0x81/0x81
lug 07 22:08:00 calvin kernel:  [<ffffffff81756463>] ? rest_init+0x77/0x77
lug 07 22:08:00 calvin kernel:  [<ffffffff81756468>] ? kernel_init+0x5/0xd0
lug 07 22:08:00 calvin kernel:  [<ffffffff8176493c>] ? ret_from_fork+0x7c/0xb0
lug 07 22:08:00 calvin kernel:  [<ffffffff81756463>] ? rest_init+0x77/0x77
lug 07 22:08:00 calvin kernel: ---[ end trace 076d7a33d4c45496 ]---
lug 07 22:08:00 calvin kernel: RAPL PMU detected, hw unit 2^-16 Joules, API 
unit is 2^-32 Joules, 3 fixed counters 163840 ms ovfl timer


Bisecting I got here:
b9e1ab6d4c0582cad97699285a6b3cf992251b00 is the first bad commit
commit b9e1ab6d4c0582cad97699285a6b3cf992251b00
Author: Stephane Eranian <eranian@google.com>
Date:   Tue Feb 11 16:20:12 2014 +0100

    perf/x86/uncore: add SNB/IVB/HSW client uncore memory controller support
    
    This patch adds a new uncore PMU for Intel SNB/IVB/HSW client
    CPUs. It adds the Integrated Memory Controller (IMC) PMU. This
    new PMU provides a set of events to measure memory bandwidth utilization.
    
    The IMC on those processor is PCI-space based. This patch
    exposes a new uncore PMU on those processor: uncore_imc
    
    Two new events are defined:
      - name: data_reads
      - code: 0x1
      - unit: 64 bytes
      - number of full cacheline read requests to the IMC
    
      - name: data_writes
      - code: 0x2
      - unit: 64 bytes
      - number of full cacheline write requests to the IMC
    
    Documentation available at:
    http://software.intel.com/en-us/articles/monitoring-integrated-memory-controller-requests-in-the-2nd-3rd-and-4th-generation-intel
    
    Cc: mingo@elte.hu
    Cc: acme@redhat.com
    Cc: ak@linux.intel.com
    Cc: zheng.z.yan@intel.com
    Cc: peterz@infradead.org
    Signed-off-by: Stephane Eranian <eranian@google.com>
    Signed-off-by: Peter Zijlstra <peterz@infradead.org>                                                                                                                                        
    Link: http://lkml.kernel.org/r/1392132015-14521-7-git-send-email-eranian@google.com                                                                                                         
    Signed-off-by: Thomas Gleixner <tglx@linutronix.de>                                                                                                                                         
                                                                                                                                                                                                
:040000 040000 2d628022cbc4b8969a2ec311082053510cf6eed5 
79b2a1cc3ed29e4820a5ae4221b4cf603c138887 M      arch   

Please note that while bisecting I got a kernel with compilation error, so I'm 
not 100% sure of the correctness of the result. I can retry the whole process 
with differen starting point, however I send here the results hoping that they 
can be of some help.

Attached you can find my config.gz 

gcc (Gentoo 4.8.3 p1.1, pie-0.5.9) 4.8.3
Linux calvin 3.15.4 #1 SMP PREEMPT Mon Jul 7 11:18:48 CEST 2014 x86_64 
Intel(R) Core(TM) i5-3427U CPU @ 1.80GHz GenuineIntel GNU/Linux

Of course I'm available for any additional information, please cc: me as I'm 
not subscribed to lkml atm.

many thanks.

-- 
Fabio

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