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Message-ID: <20150727211502.GA2492@codeblueprint.co.uk>
Date:	Mon, 27 Jul 2015 22:15:02 +0100
From:	Matt Fleming <matt@...eblueprint.co.uk>
To:	Jiang Liu <jiang.liu@...ux.intel.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>, linux-kernel@...r.kernel.org,
	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...nel.org>,
	Wolfram Sang <wsa@...-dreams.de>, linux-i2c@...r.kernel.org
Subject: Re: Regression in v4.2-rc1 caused by hierarchical irqdomain changes

On Tue, 28 Jul, at 12:35:36AM, Jiang Liu wrote:
> Hi Matt,
> 	Sorry for the regression. Could you please help to provide
> more information about the regression, such dmesg, /proc/interrupts
> and hardware(PCI) info from good and bad kernels?

See below. Let me know if you need anything else.

00:00.0 Host bridge: Intel Corporation Broadwell-U Host Bridge -OPI (rev 09)
00:02.0 VGA compatible controller: Intel Corporation Broadwell-U Integrated Graphics (rev 09)
00:03.0 Audio device: Intel Corporation Broadwell-U Audio Controller (rev 09)
00:04.0 Signal processing controller: Intel Corporation Broadwell-U Camarillo Device (rev 09)
00:14.0 USB controller: Intel Corporation Wildcat Point-LP USB xHCI Controller (rev 03)
00:16.0 Communication controller: Intel Corporation Wildcat Point-LP MEI Controller #1 (rev 03)
00:1c.0 PCI bridge: Intel Corporation Wildcat Point-LP PCI Express Root Port #1 (rev e3)
00:1c.3 PCI bridge: Intel Corporation Wildcat Point-LP PCI Express Root Port #4 (rev e3)
00:1f.0 ISA bridge: Intel Corporation Wildcat Point-LP LPC Controller (rev 03)
00:1f.2 SATA controller: Intel Corporation Wildcat Point-LP SATA Controller [AHCI Mode] (rev 03)
00:1f.3 SMBus: Intel Corporation Wildcat Point-LP SMBus Controller (rev 03)
00:1f.6 Signal processing controller: Intel Corporation Wildcat Point-LP Thermal Management Controller (rev 03)
01:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS5249 PCI Express Card Reader (rev 01)
02:00.0 Network controller: Intel Corporation Wireless 7265 (rev 59)

[BAD]

           CPU0       CPU1       CPU2       CPU3       
  0:         60          0          0          0  IR-IO-APIC   2-edge      timer
  1:       4535       2225      12990       2486  IR-IO-APIC   1-edge      i8042
  3:          1          0          0          0  IR-IO-APIC   3-edge    
  6:          0          0          0          0  IR-IO-APIC   6-edge      dw_dmac
  7:         15          1          0          0  IR-IO-APIC   7-edge      INT3432:00, INT3433:00
  8:          0          0          1          0  IR-IO-APIC   8-edge      rtc0
  9:       1078        737       1761        536  IR-IO-APIC   9-fasteoi   acpi
 12:          5          4         64         13  IR-IO-APIC  12-edge      i8042
 40:          0          0          0          0  DMAR-MSI   0-edge      dmar0
 41:          0          0          0          0  DMAR-MSI   1-edge      dmar1
 42:          0          0          0          0  IR-PCI-MSI 458752-edge      PCIe PME
 43:          0          0          0          0  IR-PCI-MSI 464896-edge      PCIe PME
 44:     263825      97055     149799      86574  IR-PCI-MSI 32768-edge      i915
 45:          4          1         20          1  IR-PCI-MSI 360448-edge      mei_me
 46:          8          7         10          5  IR-PCI-MSI 524288-edge      rtsx_pci
 47:     265262      96130     273599     126469  IR-PCI-MSI 512000-edge      0000:00:1f.2
 48:       6151       3298      11082       2702  IR-PCI-MSI 327680-edge      xhci_hcd
 49:        826         91        920        257  IR-PCI-MSI 49152-edge      snd_hda_intel
 50:     363127     229106     850576     196544  IR-PCI-MSI 1048576-edge      iwlwifi
NMI:       2190       2399       2221       1874   Non-maskable interrupts
LOC:    8199446    7602675    7137979    4973130   Local timer interrupts
SPU:          0          0          0          0   Spurious interrupts
PMI:       2190       2399       2221       1874   Performance monitoring interrupts
IWI:          0          1          1          0   IRQ work interrupts
RTR:          3          0          0          0   APIC ICR read retries
RES:    1117932    1200561    1398843     873543   Rescheduling interrupts
CAL:     145275     153343     122202     118672   Function call interrupts
TLB:      30552      30936      31487      32651   TLB shootdowns
TRM:          0          0          0          0   Thermal event interrupts
THR:          0          0          0          0   Threshold APIC interrupts
MCE:          0          0          0          0   Machine check exceptions
MCP:         71         71         71         71   Machine check polls
ERR:         15
MIS:          0

[GOOD]

           CPU0       CPU1       CPU2       CPU3       
  0:         60          0          0          0  IR-IO-APIC-edge      timer
  1:         73         26        135         54  IR-IO-APIC-edge      i8042
  3:         16         17         49         20  IR-IO-APIC-fasteoi   AudioDSP, dw_dmac
  6:          0          0          0          0  IR-IO-APIC-fasteoi   dw_dmac
  7:       2662       3072      12307       5419  IR-IO-APIC-fasteoi   INT3432:00, INT3433:00
  8:          0          0          1          0  IR-IO-APIC-edge      rtc0
  9:        265         48        280         85  IR-IO-APIC-fasteoi   acpi
 12:         20          5         61          2  IR-IO-APIC-edge      i8042
 37:          0          0          0          0  IR-IO-APIC  37-fasteoi   rt286
 39:        415         74        480        116  IR-IO-APIC  39-fasteoi   DLL0665:01
 40:          0          0          0          0  DMAR-MSI   0-edge      dmar0
 41:          0          0          0          0  DMAR-MSI   1-edge      dmar1
 42:          0          0          0          0  IR-PCI-MSI 458752-edge      PCIe PME
 43:          0          0          0          0  IR-PCI-MSI 464896-edge      PCIe PME
 44:       1007        402        696        280  IR-PCI-MSI 32768-edge      i915
 45:          4          1         20          0  IR-PCI-MSI 360448-edge      mei_me
 46:         19          1         10          0  IR-PCI-MSI 524288-edge      rtsx_pci
 47:      12101       9057      14481      30320  IR-PCI-MSI 512000-edge      0000:00:1f.2
 48:         64         29        126         27  IR-PCI-MSI 327680-edge      xhci_hcd
 49:        635         21       1179        269  IR-PCI-MSI 49152-edge      snd_hda_intel
 50:        147         60        164        222  IR-PCI-MSI 1048576-edge      iwlwifi
NMI:         16         12         18         11   Non-maskable interrupts
LOC:      21542      28287      23149      17203   Local timer interrupts
SPU:          0          0          0          0   Spurious interrupts
PMI:         16         12         18         11   Performance monitoring interrupts
IWI:          0          0          1          0   IRQ work interrupts
RTR:          3          0          0          0   APIC ICR read retries
RES:       5425       8358       6069       5476   Rescheduling interrupts
CAL:        308        297        340        293   Function call interrupts
TLB:        424        422        432        437   TLB shootdowns
TRM:          0          0          0          0   Thermal event interrupts
THR:          0          0          0          0   Threshold APIC interrupts
MCE:          0          0          0          0   Machine check exceptions
MCP:          2          2          2          2   Machine check polls
ERR:          0
MIS:          0


-- 
Matt Fleming, Intel Open Source Technology Center

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