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SubjectRe: WARNING: CPU: 2 PID: 1 at arch/x86/mm/ioremap.c:171 __ioremap_caller+0x290/0x2fa()
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[unhandled content-type:application/gzip]
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