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Message-ID: <20130506150757.GC22041@pd.tnic>
Date: Mon, 6 May 2013 17:07:57 +0200
From: Borislav Petkov <bp@...en8.de>
To: Bruno Prémont <bonbons@...ux-vserver.org>
Cc: LKML <linux-kernel@...r.kernel.org>,
Linux-ACPI <linux-acpi@...r.kernel.org>,
Len Brown <lenb@...nel.org>, "Rafael J. Wysocki" <rjw@...k.pl>,
Lance Ortiz <lance.ortiz@...com>,
Tony Luck <tony.luck@...el.com>,
Matthew Garrett <mjg59@...f.ucam.org>
Subject: Re: WARNING at drivers/pci/search.c:214 for 3.9
On Mon, May 06, 2013 at 04:21:12PM +0200, Bruno Prémont wrote:
> Booting 3.9 on a Fujitsu Primergy RX200 S7 server I get lots of
> occurrences of the following WARNING (probably one per PCI device
> listed by lspci -- overflowing my kernel log):
>
> [ 69.965933] ------------[ cut here ]------------
> [ 69.965938] WARNING: at /data/kernel/linux-git/drivers/pci/search.c:214 pci_get_dev_by_id+0x8a/0x90()
> [ 69.965941] Hardware name: PRIMERGY RX200 S7
> [ 69.965946] Modules linked in:
> [ 69.965950] Pid: 0, comm: swapper/11 Tainted: G W 3.9.0-x86_64-fj #1
> [ 69.965953] Call Trace:
> [ 69.965956] <IRQ> [<ffffffff8106689a>] warn_slowpath_common+0x7a/0xc0
> [ 69.965967] [<ffffffff810668f5>] warn_slowpath_null+0x15/0x20
> [ 69.965975] [<ffffffff8125b98a>] pci_get_dev_by_id+0x8a/0x90
> [ 69.965981] [<ffffffff8125baa0>] pci_get_subsys+0x30/0x40
> [ 69.965987] [<ffffffff8125bac3>] pci_get_device+0x13/0x20
> [ 69.965993] [<ffffffff8125baff>] pci_get_domain_bus_and_slot+0x2f/0x70
> [ 69.966001] [<ffffffff812bf3ed>] cper_print_pcie.isra.1+0x5d/0x200
> [ 69.966007] [<ffffffff812bf8c5>] apei_estatus_print_section+0x1e5/0x2c0
> [ 69.966013] [<ffffffff812bfa27>] apei_estatus_print+0x87/0xb0
> [ 69.966019] [<ffffffff812c2015>] __ghes_print_estatus.isra.8+0x75/0xc0
> [ 69.966027] [<ffffffff81239d50>] ? ___ratelimit.part.0+0x80/0xe0
> [ 69.966033] [<ffffffff812c20b9>] ghes_print_estatus.constprop.10+0x59/0x70
> [ 69.966039] [<ffffffff812c24f0>] ? ghes_irq_func+0x20/0x20
> [ 69.966044] [<ffffffff812c244c>] ghes_proc+0x5c/0x70
> [ 69.966050] [<ffffffff812c2501>] ghes_poll_func+0x11/0x30
> [ 69.966057] [<ffffffff8107332d>] call_timer_fn.isra.30+0x2d/0x90
> [ 69.966065] [<ffffffff81073536>] run_timer_softirq+0x1a6/0x1e0
> [ 69.966071] [<ffffffff8106dcc8>] __do_softirq+0xc8/0x180
> [ 69.966077] [<ffffffff8106dec6>] irq_exit+0x86/0xa0
> [ 69.966084] [<ffffffff810248d9>] smp_apic_timer_interrupt+0x69/0xa0
> [ 69.966090] [<ffffffff815f4b4a>] apic_timer_interrupt+0x6a/0x70
> [ 69.966093] <EOI> [<ffffffff814c8408>] ? cpuidle_wrap_enter+0x48/0x90
> [ 69.966101] [<ffffffff814c8404>] ? cpuidle_wrap_enter+0x44/0x90
> [ 69.966107] [<ffffffff814c8460>] cpuidle_enter_tk+0x10/0x20
> [ 69.966116] [<ffffffff814c81c5>] cpuidle_idle_call+0x85/0x100
> [ 69.966122] [<ffffffff8100b97f>] cpu_idle+0xbf/0x110
> [ 69.966129] [<ffffffff815db2ed>] start_secondary+0xbd/0xbf
> [ 69.966134] ---[ end trace 9ea0454133ddf8a3 ]---
Apparently you're not supposed to do pci_get* in IRQ context. But this
code is older than 3.9 so why does it trigger now?
> After the last occurrence I have:
> [ 69.977775] PCI AER Cannot get PCI device 0000:00:00.3
> (no idea if there is anything useful just prior to the WARNING as there
> are just too many warnings for kernel log to hold them all and userspace
> gets no opportunity to process incoming messages)
You can always increase log buf size by booting with "log_buf_len=10M"
to see whether it can catch all of them. Alternatively, serial console,
netconsole or blockconsole (this one not upstream yet).
> For older kernels (3.8.x and older) I only have:
> [ 65.741777] {1}[Hardware Error]: Hardware error from APEI Generic Hardware Error Source: 1
> [ 65.763335] {1}[Hardware Error]: APEI generic hardware error status
> [ 65.782650] {1}[Hardware Error]: severity: 2, corrected
> [ 65.782652] {1}[Hardware Error]: section: 0, severity: 2, corrected
> [ 65.782653] {1}[Hardware Error]: flags: 0x01
> [ 65.782655] {1}[Hardware Error]: primary
> [ 65.782656] {1}[Hardware Error]: fru_text: CorrectedErr
> [ 65.782658] {1}[Hardware Error]: section_type: PCIe error
> [ 65.782659] {1}[Hardware Error]: port_type: 0, PCIe end point
> [ 65.782660] {1}[Hardware Error]: version: 0.0
> [ 65.782662] {1}[Hardware Error]: command: 0xffff, status: 0xffff
> [ 65.782664] {1}[Hardware Error]: device_id: 0000:00:02.3
Interesting. AFAICT, you don't have such device in lspci below.
> [ 65.782665] {1}[Hardware Error]: slot: 0
> [ 65.782666] {1}[Hardware Error]: secondary_bus: 0x00
> [ 65.782667] {1}[Hardware Error]: vendor_id: 0xffff, device_id: 0xffff
> [ 65.782668] {1}[Hardware Error]: class_code: ffffff
>
> which was being "triggered" by
> commit 3c076351c4027a56d5005a39a0b518a4ba393ce2
> Author: Matthew Garrett <mjg@...hat.com>
> Date: Thu Nov 10 16:38:33 2011 -0500
>
> PCI: Rework ASPM disable code
And if you revert it, the error above disappears? Adding Matthew.
>
> Right now we forcibly clear ASPM state on all devices if the BIOS indicates
> that the feature isn't supported. Based on the Microsoft presentation
> "PCI Express In Depth for Windows Vista and Beyond", I'm starting to think
> that this may be an error. The implication is that unless the platform
> grants full control via _OSC, Windows will not touch any PCIe features -
> including ASPM. In that case clearing ASPM state would be an error unless
> the platform has granted us that control.
>
> This patch reworks the ASPM disabling code such that the actual clearing
> of state is triggered by a successful handoff of PCIe control to the OS.
> The general ASPM code undergoes some changes in order to ensure that the
> ability to clear the bits isn't overridden by ASPM having already been
> disabled. Further, this theoretically now allows for situations where
> only a subset of PCIe roots hand over control, leaving the others in the
> BIOS state.
>
> It's difficult to know for sure that this is the right thing to do -
> there's zero public documentation on the interaction between all of these
> components. But enough vendors enable ASPM on platforms and then set this
> bit that it seems likely that they're expecting the OS to leave them alone.
>
> Measured to save around 5W on an idle Thinkpad X220.
>
> Signed-off-by: Matthew Garrett <mjg@...hat.com>
> Signed-off-by: Jesse Barnes <jbarnes@...tuousgeek.org>
>
>
> lspci does not show any corresponding PCI device (which I assume to be some
> BIOS-disabled CPU device).
>
> lspci:
> 00:00.0 Host bridge [0600]: Intel Corporation Xeon E5/Core i7 DMI2 [8086:3c00] (rev 07)
> 00:01.0 PCI bridge [0604]: Intel Corporation Xeon E5/Core i7 IIO PCI Express Root Port 1a [8086:3c02] (rev 07)
> 00:02.0 PCI bridge [0604]: Intel Corporation Xeon E5/Core i7 IIO PCI Express Root Port 2a [8086:3c04] (rev 07)
> 00:02.2 PCI bridge [0604]: Intel Corporation Xeon E5/Core i7 IIO PCI Express Root Port 2c [8086:3c06] (rev 07)
> 00:03.0 PCI bridge [0604]: Intel Corporation Xeon E5/Core i7 IIO PCI Express Root Port 3a in PCI Express Mode [8086:3c08] (rev 07)
> 00:05.0 System peripheral [0880]: Intel Corporation Xeon E5/Core i7 Address Map, VTd_Misc, System Management [8086:3c28] (rev 07)
> 00:05.2 System peripheral [0880]: Intel Corporation Xeon E5/Core i7 Control Status and Global Errors [8086:3c2a] (rev 07)
> 00:05.4 PIC [0800]: Intel Corporation Xeon E5/Core i7 I/O APIC [8086:3c2c] (rev 07)
> 00:11.0 PCI bridge [0604]: Intel Corporation C600/X79 series chipset PCI Express Virtual Root Port [8086:1d3e] (rev 05)
> 00:1a.0 USB controller [0c03]: Intel Corporation C600/X79 series chipset USB2 Enhanced Host Controller #2 [8086:1d2d] (rev 05)
> 00:1c.0 PCI bridge [0604]: Intel Corporation C600/X79 series chipset PCI Express Root Port 1 [8086:1d10] (rev b5)
> 00:1c.7 PCI bridge [0604]: Intel Corporation C600/X79 series chipset PCI Express Root Port 8 [8086:1d1e] (rev b5)
> 00:1d.0 USB controller [0c03]: Intel Corporation C600/X79 series chipset USB2 Enhanced Host Controller #1 [8086:1d26] (rev 05)
> 00:1e.0 PCI bridge [0604]: Intel Corporation 82801 PCI Bridge [8086:244e] (rev a5)
> 00:1f.0 ISA bridge [0601]: Intel Corporation C600/X79 series chipset LPC Controller [8086:1d41] (rev 05)
> 00:1f.3 SMBus [0c05]: Intel Corporation C600/X79 series chipset SMBus Host Controller [8086:1d22] (rev 05)
> 01:00.0 RAID bus controller [0104]: LSI Logic / Symbios Logic MegaRAID SAS 2108 [Liberator] [1000:0079] (rev 05)
> 06:00.0 Ethernet controller [0200]: Intel Corporation I350 Gigabit Network Connection [8086:1521] (rev 01)
> 06:00.1 Ethernet controller [0200]: Intel Corporation I350 Gigabit Network Connection [8086:1521] (rev 01)
> 08:00.0 VGA compatible controller [0300]: Matrox Electronics Systems Ltd. MGA G200e [Pilot] ServerEngines (SEP1) [102b:0522] (rev 05)
> ff:08.0 System peripheral [0880]: Intel Corporation Xeon E5/Core i7 QPI Link 0 [8086:3c80] (rev 07)
> ff:08.3 System peripheral [0880]: Intel Corporation Xeon E5/Core i7 QPI Link Reut 0 [8086:3c83] (rev 07)
> ff:08.4 System peripheral [0880]: Intel Corporation Xeon E5/Core i7 QPI Link Reut 0 [8086:3c84] (rev 07)
> ff:09.0 System peripheral [0880]: Intel Corporation Xeon E5/Core i7 QPI Link 1 [8086:3c90] (rev 07)
> ff:09.3 System peripheral [0880]: Intel Corporation Xeon E5/Core i7 QPI Link Reut 1 [8086:3c93] (rev 07)
> ff:09.4 System peripheral [0880]: Intel Corporation Xeon E5/Core i7 QPI Link Reut 1 [8086:3c94] (rev 07)
> ff:0a.0 System peripheral [0880]: Intel Corporation Xeon E5/Core i7 Power Control Unit 0 [8086:3cc0] (rev 07)
> ff:0a.1 System peripheral [0880]: Intel Corporation Xeon E5/Core i7 Power Control Unit 1 [8086:3cc1] (rev 07)
> ff:0a.2 System peripheral [0880]: Intel Corporation Xeon E5/Core i7 Power Control Unit 2 [8086:3cc2] (rev 07)
> ff:0a.3 System peripheral [0880]: Intel Corporation Xeon E5/Core i7 Power Control Unit 3 [8086:3cd0] (rev 07)
> ff:0b.0 System peripheral [0880]: Intel Corporation Xeon E5/Core i7 Interrupt Control Registers [8086:3ce0] (rev 07)
> ff:0b.3 System peripheral [0880]: Intel Corporation Xeon E5/Core i7 Semaphore and Scratchpad Configuration Registers [8086:3ce3] (rev 07)
> ff:0c.0 System peripheral [0880]: Intel Corporation Xeon E5/Core i7 Unicast Register 0 [8086:3ce8] (rev 07)
> ff:0c.1 System peripheral [0880]: Intel Corporation Xeon E5/Core i7 Unicast Register 0 [8086:3ce8] (rev 07)
> ff:0c.2 System peripheral [0880]: Intel Corporation Xeon E5/Core i7 Unicast Register 0 [8086:3ce8] (rev 07)
> ff:0c.6 System peripheral [0880]: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller System Address Decoder 0 [8086:3cf4] (rev 07)
> ff:0c.7 System peripheral [0880]: Intel Corporation Xeon E5/Core i7 System Address Decoder [8086:3cf6] (rev 07)
> ff:0d.0 System peripheral [0880]: Intel Corporation Xeon E5/Core i7 Unicast Register 0 [8086:3ce8] (rev 07)
> ff:0d.1 System peripheral [0880]: Intel Corporation Xeon E5/Core i7 Unicast Register 0 [8086:3ce8] (rev 07)
> ff:0d.2 System peripheral [0880]: Intel Corporation Xeon E5/Core i7 Unicast Register 0 [8086:3ce8] (rev 07)
> ff:0d.6 System peripheral [0880]: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller System Address Decoder 1 [8086:3cf5] (rev 07)
> ff:0e.0 System peripheral [0880]: Intel Corporation Xeon E5/Core i7 Processor Home Agent [8086:3ca0] (rev 07)
> ff:0e.1 Performance counters [1101]: Intel Corporation Xeon E5/Core i7 Processor Home Agent Performance Monitoring [8086:3c46] (rev 07)
> ff:0f.0 System peripheral [0880]: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller Registers [8086:3ca8] (rev 07)
> ff:0f.1 System peripheral [0880]: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller RAS Registers [8086:3c71] (rev 07)
> ff:0f.2 System peripheral [0880]: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller Target Address Decoder 0 [8086:3caa] (rev 07)
> ff:0f.3 System peripheral [0880]: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller Target Address Decoder 1 [8086:3cab] (rev 07)
> ff:0f.4 System peripheral [0880]: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller Target Address Decoder 2 [8086:3cac] (rev 07)
> ff:0f.5 System peripheral [0880]: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller Target Address Decoder 3 [8086:3cad] (rev 07)
> ff:0f.6 System peripheral [0880]: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller Target Address Decoder 4 [8086:3cae] (rev 07)
> ff:10.0 System peripheral [0880]: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller Channel 0-3 Thermal Control 0 [8086:3cb0] (rev 07)
> ff:10.1 System peripheral [0880]: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller Channel 0-3 Thermal Control 1 [8086:3cb1] (rev 07)
> ff:10.2 System peripheral [0880]: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller ERROR Registers 0 [8086:3cb2] (rev 07)
> ff:10.3 System peripheral [0880]: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller ERROR Registers 1 [8086:3cb3] (rev 07)
> ff:10.4 System peripheral [0880]: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller Channel 0-3 Thermal Control 2 [8086:3cb4] (rev 07)
> ff:10.5 System peripheral [0880]: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller Channel 0-3 Thermal Control 3 [8086:3cb5] (rev 07)
> ff:10.6 System peripheral [0880]: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller ERROR Registers 2 [8086:3cb6] (rev 07)
> ff:10.7 System peripheral [0880]: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller ERROR Registers 3 [8086:3cb7] (rev 07)
> ff:11.0 System peripheral [0880]: Intel Corporation Xeon E5/Core i7 DDRIO [8086:3cb8] (rev 07)
> ff:13.0 System peripheral [0880]: Intel Corporation Xeon E5/Core i7 R2PCIe [8086:3ce4] (rev 07)
> ff:13.1 Performance counters [1101]: Intel Corporation Xeon E5/Core i7 Ring to PCI Express Performance Monitor [8086:3c43] (rev 07)
> ff:13.4 Performance counters [1101]: Intel Corporation Xeon E5/Core i7 QuickPath Interconnect Agent Ring Registers [8086:3ce6] (rev 07)
> ff:13.5 Performance counters [1101]: Intel Corporation Xeon E5/Core i7 Ring to QuickPath Interconnect Link 0 Performance Monitor [8086:3c44] (rev 07)
> ff:13.6 System peripheral [0880]: Intel Corporation Xeon E5/Core i7 Ring to QuickPath Interconnect Link 1 Performance Monitor [8086:3c45] (rev 07)
>
>
> Bruno
>
--
Regards/Gruss,
Boris.
Sent from a fat crate under my desk. Formatting is fine.
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