Bug#836734: Considerable I/O performance regression on Lenovo Carbon X1 with 4.7.0

From	Yuri D'Elia <wavexx@thregr.org>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#836734: Considerable I/O performance regression on Lenovo Carbon X1 with 4.7.0
Date	2016-09-05 12:40 +0200
Message-ID	<sdZtM-2y1-21@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

Cross-posted to 2 groups.

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Package: src:linux
Version: 4.7.2-1
Severity: normal

I'm using a Carbon X1 (3rd gen). Compared to the latest 4.6 kernel, this image
has a significant performance regression in all I/O related operations.

Just as a ballpark, 4.6.0-1 can boot in generally less than 3 seconds after the
grub screen. With 4.7.0-1, it takes over 10.

I'm unsure at what exactly look for, as it could also be related to many
subsystems (I'm using an ext4 fs in an encrypted volume).

-- Package-specific info:
** Version:
Linux version 4.7.0-1-amd64 (debian-kernel@lists.debian.org) (gcc version 5.4.1 20160803 (Debian 5.4.1-1) ) #1 SMP Debian 4.7.2-1 (2016-08-28)

** Command line:
BOOT_IMAGE=/vmlinuz-4.7.0-1-amd64 root=/dev/mapper/eab16011nb--vg-root ro quiet

** Tainted: OE (12288)
 * Out-of-tree module has been loaded.
 * Unsigned module has been loaded (currently expected).

** Kernel log:
[   11.622772] iwlwifi 0000:04:00.0: firmware: failed to load iwlwifi-7265D-17.ucode (-2)
[   11.622847] iwlwifi 0000:04:00.0: Direct firmware load for iwlwifi-7265D-17.ucode failed with error -2
[   11.625002] iwlwifi 0000:04:00.0: firmware: direct-loading firmware iwlwifi-7265D-16.ucode
[   11.625334] iwlwifi 0000:04:00.0: loaded firmware version 16.242414.0 op_mode iwlmvm
[   11.642592] iwlwifi 0000:04:00.0: Detected Intel(R) Dual Band Wireless AC 7265, REV=0x210
[   11.644390] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled
[   11.644830] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled
[   11.669474] intel_rapl: Found RAPL domain package
[   11.669478] intel_rapl: Found RAPL domain core
[   11.669481] intel_rapl: Found RAPL domain uncore
[   11.669483] intel_rapl: Found RAPL domain dram
[   11.676332] [drm] Memory usable by graphics device = 4096M
[   11.676342] [drm] Replacing VGA console driver
[   11.676914] Console: switching to colour dummy device 80x25
[   11.682301] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[   11.682304] [drm] Driver supports precise vblank timestamp query.
[   11.682538] vgaarb: device changed decodes: PCI:0000:00:02.0,olddecodes=io+mem,decodes=io+mem:owns=io+mem
[   11.720562] ACPI: Video Device [VID] (multi-head: yes  rom: no  post: no)
[   11.720990] input: Video Bus as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:00/input/input16
[   11.723454] usb 1-7: USB disconnect, device number 5
[   11.724809] systemd-journald[1407]: Received request to flush runtime journal from PID 1
[   11.727172] ieee80211 phy0: Selected rate control algorithm 'iwl-mvm-rs'
[   11.783316] EXT4-fs (sda1): mounting ext2 file system using the ext4 subsystem
[   11.950560] snd_hda_intel 0000:00:03.0: bound 0000:00:02.0 (ops i915_audio_component_bind_ops [i915])
[   11.950567] [drm] Initialized i915 1.6.0 20160425 for 0000:00:02.0 on minor 0
[   11.951760] fbcon: inteldrmfb (fb0) is primary device
[   11.958763] Bluetooth: Core ver 2.21
[   11.958777] NET: Registered protocol family 31
[   11.958777] Bluetooth: HCI device and connection manager initialized
[   11.958780] Bluetooth: HCI socket layer initialized
[   11.958783] Bluetooth: L2CAP socket layer initialized
[   11.958788] Bluetooth: SCO socket layer initialized
[   11.963733] usbcore: registered new interface driver btusb
[   11.967069] input: HDA Intel HDMI HDMI/DP,pcm=3 as /devices/pci0000:00/0000:00:03.0/sound/card1/input17
[   11.967121] input: HDA Intel HDMI HDMI/DP,pcm=7 as /devices/pci0000:00/0000:00:03.0/sound/card1/input18
[   11.967167] input: HDA Intel HDMI HDMI/DP,pcm=8 as /devices/pci0000:00/0000:00:03.0/sound/card1/input19
[   12.438944] scsi 1:0:0:0: Direct-Access     Generic- SD/MMC/MS/MSPRO  1.00 PQ: 0 ANSI: 4
[   12.439447] sd 1:0:0:0: Attached scsi generic sg1 type 0
[   12.444441] sd 1:0:0:0: [sdb] Attached SCSI removable disk
[   12.461107] input: ELAN Touchscreen as /devices/pci0000:00/0000:00:14.0/usb1/1-5/1-5:1.0/0003:04F3:012D.0001/input/input20
[   12.461297] hid-multitouch 0003:04F3:012D.0001: input,hiddev0,hidraw4: USB HID v1.10 Device [ELAN Touchscreen] on usb-0000:00:14.0-5/input0
[   12.495250] media: Linux media interface: v0.10
[   12.500011] Linux video capture interface: v2.00
[   12.588796] uvcvideo: Found UVC 1.00 device Integrated Camera (04f2:b45d)
[   12.591621] uvcvideo 1-8:1.0: Entity type for entity Extension 4 was not initialized!
[   12.591623] uvcvideo 1-8:1.0: Entity type for entity Processing 2 was not initialized!
[   12.591625] uvcvideo 1-8:1.0: Entity type for entity Camera 1 was not initialized!
[   12.591740] input: Integrated Camera as /devices/pci0000:00/0000:00:14.0/usb1/1-8/1-8:1.0/input/input22
[   12.591834] usbcore: registered new interface driver uvcvideo
[   12.591834] USB Video Class driver (1.1.1)
[   12.712458] EXT4-fs (sda1): mounted filesystem without journal. Opts: user_xattr
[   12.998648] [drm] Reducing the compressed framebuffer size. This may lead to less power savings than a non-reduced-size. Try to increase stolen memory size if available in BIOS.
[   13.251132] Console: switching to colour frame buffer device 240x75
[   13.255555] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
[   13.500614] usb 1-2.3.3: USB disconnect, device number 11
[   13.504393] scsi 1:0:0:0: rejecting I/O to offline device
[   13.506727] scsi 1:0:0:0: killing request
[   13.549875] usb 1-2.3.1: Warning! Unlikely big volume range (=8192), cval->res is probably wrong.
[   13.549879] usb 1-2.3.1: [11] FU [Sidetone Playback Volume] ch = 1, val = 0/8192/1
[   13.554665] usbcore: registered new interface driver snd-usb-audio
[   14.369829] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled
[   14.370523] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled
[   14.436689] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled
[   14.437282] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled
[   14.460261] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[   15.275510] cgroup: new mount options do not match the existing superblock, will be ignored
[   15.313677] fuse init (API version 7.25)
[   15.508792] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[   16.857082] Process accounting resumed
[   18.170306] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[   18.196983] wlan0: authenticate with 64:d8:14:6e:08:b0
[   18.203394] wlan0: send auth to 64:d8:14:6e:08:b0 (try 1/3)
[   18.204481] wlan0: authenticated
[   18.204806] wlan0: associate with 64:d8:14:6e:08:b0 (try 1/3)
[   18.207842] wlan0: RX AssocResp from 64:d8:14:6e:08:b0 (capab=0x411 status=0 aid=37)
[   18.208412] wlan0: associated
[   18.208448] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[   18.212144] wlan0: Limiting TX power to 20 (20 - 0) dBm as advertised by 64:d8:14:6e:08:b0
[   19.292168] e1000e: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None
[   19.413026] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[   19.463722] wlan0: deauthenticating from 64:d8:14:6e:08:b0 by local choice (Reason: 3=DEAUTH_LEAVING)
[   20.082174] IPv4: martian source 255.255.255.255 from 10.60.220.22, on dev eth0
[   20.082178] ll header: 00000000: ff ff ff ff ff ff 2c 27 d7 1f 57 8c 08 00        ......,'..W...
[   20.097765] IPv4: martian source 255.255.255.255 from 10.60.220.254, on dev eth0
[   20.097771] ll header: 00000000: ff ff ff ff ff ff fc 99 47 9c 12 4a 08 00        ........G..J..
[   20.098035] IPv4: martian source 255.255.255.255 from 10.60.220.254, on dev eth0
[   20.098039] ll header: 00000000: ff ff ff ff ff ff fc 99 47 9c 12 4a 08 00        ........G..J..
[   20.516758] IPv4: martian source 255.255.255.255 from 10.60.220.41, on dev eth0
[   20.516762] ll header: 00000000: ff ff ff ff ff ff 00 24 9b 11 b8 e3 08 00        .......$......
[   20.519404] IPv4: martian source 255.255.255.255 from 10.60.220.41, on dev eth0
[   20.519408] ll header: 00000000: ff ff ff ff ff ff 00 24 9b 11 b8 e3 08 00        .......$......
[   20.519577] IPv4: martian source 255.255.255.255 from 10.60.220.41, on dev eth0
[   20.519579] ll header: 00000000: ff ff ff ff ff ff 00 24 9b 11 b8 e3 08 00        .......$......
[   25.513708] usb 1-2.3.1: 1:1: cannot get freq at ep 0x81
[   25.535024] usb 1-2.3.1: 1:1: cannot get freq at ep 0x81
[   25.537472] usb 1-2.3.1: 1:1: cannot get freq at ep 0x81
[   25.537564] usb 1-2.3.1: 1:1: cannot set freq 44100 to ep 0x81
[   25.539608] usb 1-2.3.1: 1:1: cannot set freq 44100 to ep 0x81
[   25.541708] usb 1-2.3.1: 1:1: cannot set freq 44100 to ep 0x81
[   25.543795] usb 1-2.3.1: 1:1: cannot set freq 44100 to ep 0x81

** Model information
sys_vendor: LENOVO
product_name: 20BTS3GT00
product_version: ThinkPad X1 Carbon 3rd
chassis_vendor: LENOVO
chassis_version: None
bios_vendor: LENOVO
bios_version: N14ET35W (1.13 )
board_vendor: LENOVO
board_name: 20BTS3GT00
board_version: SDK0K11826 WIN

** Loaded modules:
ctr
ccm
cpufreq_userspace
cpufreq_conservative
cpufreq_stats
cpufreq_powersave
fuse
snd_usb_audio
snd_usbmidi_lib
snd_rawmidi
snd_seq_device
binfmt_misc
uvcvideo
videobuf2_vmalloc
videobuf2_memops
videobuf2_v4l2
videobuf2_core
videodev
media
hid_multitouch
snd_hda_codec_hdmi
btusb
btrtl
btbcm
btintel
bluetooth
arc4
intel_rapl
x86_pkg_temp_thermal
intel_powerclamp
iwlmvm
mac80211
msr
coretemp
acpi_call(OE)
uas
usb_storage
iTCO_wdt
iTCO_vendor_support
snd_hda_codec_realtek
snd_hda_codec_generic
i915
kvm_intel
drm_kms_helper
iwlwifi
kvm
snd_hda_intel
snd_hda_codec
sg
joydev
snd_hda_core
irqbypass
evdev
cfg80211
thinkpad_acpi
pcspkr
serio_raw
drm
snd_hwdep
nvram
lpc_ich
snd_pcm
i2c_i801
intel_pch_thermal
mei_me
mfd_core
snd_timer
snd
mei
shpchp
i2c_algo_bit
wmi
ac
battery
soundcore
rfkill
tpm_crb
video
button
tpm_tis
tpm
nf_conntrack_ipv6
nf_defrag_ipv6
ip6table_filter
ip6_tables
ipt_REJECT
nf_reject_ipv4
xt_tcpudp
nf_conntrack_ipv4
nf_defrag_ipv4
xt_conntrack
nf_conntrack
iptable_filter
sch_fq_codel
ip_tables
x_tables
autofs4
ext4
crc16
jbd2
mbcache
algif_skcipher
af_alg
hid_plantronics
hid_generic
usbhid
hid
dm_crypt
dm_mod
sd_mod
crct10dif_pclmul
crc32_pclmul
crc32c_intel
ghash_clmulni_intel
jitterentropy_rng
hmac
drbg
ansi_cprng
aesni_intel
ahci
aes_x86_64
libahci
lrw
gf128mul
glue_helper
ablk_helper
libata
cryptd
e1000e
xhci_pci
xhci_hcd
psmouse
scsi_mod
ptp
pps_core
usbcore
usb_common
thermal
fjes

** PCI devices:
00:00.0 Host bridge [0600]: Intel Corporation Broadwell-U Host Bridge -OPI [8086:1604] (rev 09)
	Subsystem: Lenovo Broadwell-U Host Bridge -OPI [17aa:2227]
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort+ >SERR- <PERR- INTx-
	Latency: 0
	Capabilities: <access denied>
	Kernel driver in use: bdw_uncore

00:02.0 VGA compatible controller [0300]: Intel Corporation Broadwell-U Integrated Graphics [8086:1616] (rev 09) (prog-if 00 [VGA controller])
	Subsystem: Lenovo HD Graphics 5500 [17aa:2227]
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
	Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Interrupt: pin A routed to IRQ 55
	Region 0: Memory at e0000000 (64-bit, non-prefetchable) [size=16M]
	Region 2: Memory at c0000000 (64-bit, prefetchable) [size=512M]
	Region 4: I/O ports at 3000 [size=64]
	[virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
	Capabilities: <access denied>
	Kernel driver in use: i915
	Kernel modules: i915

00:03.0 Audio device [0403]: Intel Corporation Broadwell-U Audio Controller [8086:160c] (rev 09)
	Subsystem: Lenovo Broadwell-U Audio Controller [17aa:2227]
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0, Cache Line Size: 64 bytes
	Interrupt: pin A routed to IRQ 56
	Region 0: Memory at e1230000 (64-bit, non-prefetchable) [size=16K]
	Capabilities: <access denied>
	Kernel driver in use: snd_hda_intel
	Kernel modules: snd_hda_intel

00:14.0 USB controller [0c03]: Intel Corporation Wildcat Point-LP USB xHCI Controller [8086:9cb1] (rev 03) (prog-if 30 [XHCI])
	Subsystem: Lenovo Wildcat Point-LP USB xHCI Controller [17aa:2227]
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
	Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Interrupt: pin A routed to IRQ 42
	Region 0: Memory at e1220000 (64-bit, non-prefetchable) [size=64K]
	Capabilities: <access denied>
	Kernel driver in use: xhci_hcd
	Kernel modules: xhci_pci

00:16.0 Communication controller [0780]: Intel Corporation Wildcat Point-LP MEI Controller #1 [8086:9cba] (rev 03)
	Subsystem: Lenovo Wildcat Point-LP MEI Controller [17aa:2227]
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Interrupt: pin A routed to IRQ 52
	Region 0: Memory at e1239000 (64-bit, non-prefetchable) [size=32]
	Capabilities: <access denied>
	Kernel driver in use: mei_me
	Kernel modules: mei_me

00:19.0 Ethernet controller [0200]: Intel Corporation Ethernet Connection (3) I218-V [8086:15a3] (rev 03)
	Subsystem: Lenovo Ethernet Connection (3) I218-V [17aa:2227]
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Interrupt: pin A routed to IRQ 43
	Region 0: Memory at e1200000 (32-bit, non-prefetchable) [size=128K]
	Region 1: Memory at e123c000 (32-bit, non-prefetchable) [size=4K]
	Region 2: I/O ports at 3060 [size=32]
	Capabilities: <access denied>
	Kernel driver in use: e1000e
	Kernel modules: e1000e

00:1b.0 Audio device [0403]: Intel Corporation Wildcat Point-LP High Definition Audio Controller [8086:9ca0] (rev 03)
	Subsystem: Lenovo Wildcat Point-LP High Definition Audio Controller [17aa:2227]
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 32, Cache Line Size: 64 bytes
	Interrupt: pin A routed to IRQ 53
	Region 0: Memory at e1234000 (64-bit, non-prefetchable) [size=16K]
	Capabilities: <access denied>
	Kernel driver in use: snd_hda_intel
	Kernel modules: snd_hda_intel

00:1c.0 PCI bridge [0604]: Intel Corporation Wildcat Point-LP PCI Express Root Port #2 [8086:9c92] (rev e3) (prog-if 00 [Normal decode])
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0, Cache Line Size: 64 bytes
	Interrupt: pin B routed to IRQ 17
	Bus: primary=00, secondary=03, subordinate=03, sec-latency=0
	I/O behind bridge: 00002000-00002fff
	Memory behind bridge: b0100000-b02fffff
	Prefetchable memory behind bridge: 00000000b0300000-00000000b04fffff
	Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort+ <SERR- <PERR-
	BridgeCtl: Parity- SERR- NoISA- VGA- MAbort- >Reset- FastB2B-
		PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
	Capabilities: <access denied>
	Kernel driver in use: pcieport
	Kernel modules: shpchp

00:1c.1 PCI bridge [0604]: Intel Corporation Wildcat Point-LP PCI Express Root Port #3 [8086:9c94] (rev e3) (prog-if 00 [Normal decode])
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0, Cache Line Size: 64 bytes
	Interrupt: pin C routed to IRQ 18
	Bus: primary=00, secondary=04, subordinate=04, sec-latency=0
	Memory behind bridge: e1100000-e11fffff
	Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort+ <SERR- <PERR-
	BridgeCtl: Parity- SERR- NoISA- VGA- MAbort- >Reset- FastB2B-
		PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
	Capabilities: <access denied>
	Kernel driver in use: pcieport
	Kernel modules: shpchp

00:1c.5 PCI bridge [0604]: Intel Corporation Wildcat Point-LP PCI Express Root Port #6 [8086:9c9a] (rev e3) (prog-if 00 [Normal decode])
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0, Cache Line Size: 64 bytes
	Interrupt: pin B routed to IRQ 17
	Bus: primary=00, secondary=0a, subordinate=0a, sec-latency=0
	Memory behind bridge: e1000000-e10fffff
	Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort+ <SERR- <PERR-
	BridgeCtl: Parity- SERR- NoISA- VGA- MAbort- >Reset- FastB2B-
		PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
	Capabilities: <access denied>
	Kernel driver in use: pcieport
	Kernel modules: shpchp

00:1f.0 ISA bridge [0601]: Intel Corporation Wildcat Point-LP LPC Controller [8086:9cc3] (rev 03)
	Subsystem: Lenovo Wildcat Point-LP LPC Controller [17aa:2227]
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Capabilities: <access denied>
	Kernel driver in use: lpc_ich
	Kernel modules: lpc_ich

00:1f.3 SMBus [0c05]: Intel Corporation Wildcat Point-LP SMBus Controller [8086:9ca2] (rev 03)
	Subsystem: Lenovo Wildcat Point-LP SMBus Controller [17aa:2227]
	Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Interrupt: pin C routed to IRQ 18
	Region 0: Memory at e1238000 (64-bit, non-prefetchable) [size=256]
	Region 4: I/O ports at efa0 [size=32]
	Kernel driver in use: i801_smbus
	Kernel modules: i2c_i801

00:1f.6 Signal processing controller [1180]: Intel Corporation Wildcat Point-LP Thermal Management Controller [8086:9ca4] (rev 03)
	Subsystem: Lenovo Wildcat Point-LP Thermal Management Controller [17aa:2227]
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Interrupt: pin C routed to IRQ 18
	Region 0: Memory at e123b000 (64-bit, non-prefetchable) [size=4K]
	Capabilities: <access denied>
	Kernel driver in use: intel_pch_thermal
	Kernel modules: intel_pch_thermal

04:00.0 Network controller [0280]: Intel Corporation Wireless 7265 [8086:095b] (rev 99)
	Subsystem: Intel Corporation Dual Band Wireless-AC 7265 [8086:5210]
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0, Cache Line Size: 64 bytes
	Interrupt: pin A routed to IRQ 54
	Region 0: Memory at e1100000 (64-bit, non-prefetchable) [size=8K]
	Capabilities: <access denied>
	Kernel driver in use: iwlwifi
	Kernel modules: iwlwifi

0a:00.0 SATA controller [0106]: Samsung Electronics Co Ltd Device [144d:a801] (rev 01) (prog-if 01 [AHCI 1.0])
	Subsystem: Samsung Electronics Co Ltd Device [144d:a801]
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort+ <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0, Cache Line Size: 64 bytes
	Interrupt: pin A routed to IRQ 44
	Region 5: Memory at e1000000 (32-bit, non-prefetchable) [size=8K]
	Capabilities: <access denied>
	Kernel driver in use: ahci
	Kernel modules: ahci


** USB devices:
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 007: ID 04f2:b45d Chicony Electronics Co., Ltd 
Bus 001 Device 003: ID 04f3:012d Elan Microelectronics Corp. 
Bus 001 Device 010: ID 047f:c025 Plantronics, Inc. 
Bus 001 Device 008: ID 0451:8043 Texas Instruments, Inc. 
Bus 001 Device 009: ID 05f3:0007 PI Engineering, Inc. Kinesis Advantage PRO MPC/USB Keyboard
Bus 001 Device 006: ID 05f3:0081 PI Engineering, Inc. Kinesis Integrated Hub
Bus 001 Device 004: ID 046d:c050 Logitech, Inc. RX 250 Optical Mouse
Bus 001 Device 002: ID 0451:8043 Texas Instruments, Inc. 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub


-- System Information:
Debian Release: stretch/sid
  APT prefers unstable
  APT policy: (900, 'unstable'), (800, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 4.7.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages linux-image-4.7.0-1-amd64 depends on:
ii  initramfs-tools [linux-initramfs-tool]  0.125
ii  kmod                                    22-1.1
ii  linux-base                              4.4

Versions of packages linux-image-4.7.0-1-amd64 recommends:
ii  firmware-linux-free  3.4
ii  irqbalance           1.1.0-2

Versions of packages linux-image-4.7.0-1-amd64 suggests:
pn  debian-kernel-handbook  <none>
ii  grub-pc                 2.02~beta2-36
ii  linux-doc-4.7           4.7.2-1

Versions of packages linux-image-4.7.0-1-amd64 is related to:
ii  firmware-amd-graphics     20160110-1
pn  firmware-atheros          <none>
pn  firmware-bnx2             <none>
pn  firmware-bnx2x            <none>
pn  firmware-brcm80211        <none>
pn  firmware-cavium           <none>
ii  firmware-intel-sound      20160110-1
pn  firmware-intelwimax       <none>
pn  firmware-ipw2x00          <none>
pn  firmware-ivtv             <none>
ii  firmware-iwlwifi          20160110-1
pn  firmware-libertas         <none>
ii  firmware-linux-nonfree    20160110-1
ii  firmware-misc-nonfree     20160110-1
pn  firmware-myricom          <none>
pn  firmware-netxen           <none>
pn  firmware-qlogic           <none>
pn  firmware-realtek          <none>
pn  firmware-samsung          <none>
pn  firmware-siano            <none>
pn  firmware-ti-connectivity  <none>
pn  xen-hypervisor            <none>

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Bug#836734: Considerable I/O performance regression on Lenovo Carbon X1 with 4.7.0 Yuri D'Elia <wavexx@thregr.org> - 2016-09-05 12:40 +0200
  Processed: Re: Bug#836734: Considerable I/O performance  regression on Lenovo Carbon X1 with 4.7.0 owner@bugs.debian.org (Debian Bug Tracking System) - 2016-11-02 21:20 +0100
  Bug#836734: Considerable I/O performance regression on Lenovo Carbon X1 with 4.7.0 Salvatore Bonaccorso <carnil@debian.org> - 2016-11-02 21:20 +0100
    Bug#836734: Considerable I/O performance regression on Lenovo Carbon X1 with 4.7.0 Yuri D'Elia <wavexx@thregr.org> - 2016-11-03 16:10 +0100

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