On 12.01.2017 15:33, Christoph Anton Mitterer wrote:
Hi.
This is basically from:
https://bugzilla.kernel.org/show_bug.cgi?id=108341
respectively
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=805903
the later in which Ben Hutchings recommended me to ping this list as
well.
I bought a USB3.0 ExpressCard from StarTech[0] which is apparently[1]
based on the NEC uPD720200.
Using a kernel 4.2.6 (see further below for the same on a more recent kernel
version) on amd64, the System is Debian sid, the following
happens when I plug the card:
kernel logs show:
Nov 21 17:15:22 heisenberg kernel: [ 102.387452] pci 0000:01:00.0: [1033:0194]
type 00 class 0x0c0330
Nov 21 17:15:22 heisenberg kernel: [ 102.387545] pci 0000:01:00.0: reg 0x10:
[mem0x00000000-0x00001fff 64bit]
Nov 21 17:15:22 heisenberg kernel: [ 102.387723] pci 0000:01:00.0: PME#
supported from D0 D3hot
Nov 21 17:15:22 heisenberg kernel: [ 102.394689] pci 0000:01:00.0: BAR 0:
assigned [mem0xf0d00000-0xf0d01fff 64bit]
Nov 21 17:15:22 heisenberg kernel: [ 102.394750] pci 0000:01:00.0: enabling
device (0000 -> 0002)
Nov 21 17:15:22 heisenberg kernel: [ 102.395178] xhci_hcd 0000:01:00.0: xHCI
Host Controller
Nov 21 17:15:22 heisenberg kernel: [ 102.395192] xhci_hcd 0000:01:00.0: new
USB bus registered,assigned bus number 5
Nov 21 17:15:22 heisenberg kernel: [ 102.395418] xhci_hcd 0000:01:00.0: hcc
params 0x014042cb hciversion 0x96 quirks 0x00000004
Nov 21 17:15:22 heisenberg kernel: [ 102.395892] usb usb5: New USB device
found, idVendor=1d6b, idProduct=0002
Nov 21 17:15:22 heisenberg kernel: [ 102.395896] usb usb5: New USB device
strings: Mfr=3, Product=2, SerialNumber=1
Nov 21 17:15:22 heisenberg kernel: [ 102.395899] usb usb5: Product: xHCI Host
Controller
Nov 21 17:15:22 heisenberg kernel: [ 102.395902] usb usb5: Manufacturer: Linux
4.2.0-1-amd64 xhci-hcd
Nov 21 17:15:22 heisenberg kernel: [ 102.395905] usb usb5: SerialNumber:
0000:01:00.0
Nov 21 17:15:22 heisenberg kernel: [ 102.396308] hub 5-0:1.0: USB hub found
Nov 21 17:15:22 heisenberg kernel: [ 102.396331] hub 5-0:1.0: 2 ports detected
Nov 21 17:15:22 heisenberg kernel: [ 102.396591] xhci_hcd 0000:01:00.0: xHCI
Host Controller
Nov 21 17:15:22 heisenberg kernel: [ 102.396599] xhci_hcd 0000:01:00.0: new
USB bus registered,assigned bus number 6
Nov 21 17:15:22 heisenberg kernel: [ 102.398835] usb usb6: We don't know the
algorithms for LPM forthis host, disabling LPM.
Nov 21 17:15:22 heisenberg kernel: [ 102.398883] usb usb6: New USB device
found, idVendor=1d6b, idProduct=0003
Nov 21 17:15:22 heisenberg kernel: [ 102.398887] usb usb6: New USB device
strings: Mfr=3, Product=2, SerialNumber=1
Nov 21 17:15:22 heisenberg kernel: [ 102.398890] usb usb6: Product: xHCI Host
Controller
Nov 21 17:15:22 heisenberg kernel: [ 102.398892] usb usb6: Manufacturer: Linux
4.2.0-1-amd64 xhci-hcd
Nov 21 17:15:22 heisenberg kernel: [ 102.398895] usb usb6: SerialNumber:
0000:01:00.0
Nov 21 17:15:22 heisenberg kernel: [ 102.399272] hub 6-0:1.0: USB hub found
Nov 21 17:15:22 heisenberg kernel: [ 102.399294] hub 6-0:1.0: 2 ports detected
and when removing:
Nov 21 17:15:40 heisenberg kernel: [ 120.541515] xhci_hcd 0000:01:00.0:
remove, state 4
Nov 21 17:15:40 heisenberg kernel: [ 120.544671] usb usb6: USB disconnect,
device number 1
Nov 21 17:15:40 heisenberg kernel: [ 120.546683] xhci_hcd 0000:01:00.0: Host
not halted after 16000 microseconds.
Nov 21 17:15:40 heisenberg kernel: [ 120.547611] xhci_hcd 0000:01:00.0: USB
bus 6 deregistered
Nov 21 17:15:40 heisenberg kernel: [ 120.547618] xhci_hcd 0000:01:00.0:
remove, state 4
Nov 21 17:15:40 heisenberg kernel: [ 120.547622] usb usb5: USB disconnect,
device number 1
Nov 21 17:15:40 heisenberg kernel: [ 120.547735] xhci_hcd 0000:01:00.0: USB
bus 5 deregistered
Now the problem is that immediately when I attach the card, a kworker
process starts to utilise the CPU to always around 72%.
And it never stops again until I shutdown; removing the card doesn't
help.
Does this kworker start to utilize the CPU immediately after a fresh boot when
the card is inserted,
or only after the first card removal?
If after first removal then it could be related to this:
https://www.spinics.net/lists/stable/msg155829.html
-Mathias
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