On Thu, Jan 12, 2017 at 02:33:36PM +0100, 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. What kworker process causes this? Does it have a name? > > > > On a more recent: > $ uname -a > Linux heisenberg 4.8.0-2-amd64 #1 SMP Debian 4.8.15-2 (2017-01-04) x86_64 GNU/Linux > > > kernel log for the inserted USB3.0 ExpressCard from StarTech: > Jan 12 14:15:13 heisenberg kernel: pci 0000:01:00.0: [1033:0194] type 00 class 0x0c0330 > Jan 12 14:15:13 heisenberg kernel: pci 0000:01:00.0: reg 0x10: [mem 0x00000000-0x00001fff 64bit] > Jan 12 14:15:13 heisenberg kernel: pci 0000:01:00.0: PME# supported from D0 D3hot > Jan 12 14:15:13 heisenberg kernel: pci 0000:01:00.0: BAR 0: assigned [mem 0xf0d00000-0xf0d01fff 64bit] > Jan 12 14:15:13 heisenberg kernel: pci 0000:01:00.0: enabling device (0000 -> 0002) > Jan 12 14:15:13 heisenberg kernel: xhci_hcd 0000:01:00.0: xHCI Host Controller > Jan 12 14:15:13 heisenberg kernel: xhci_hcd 0000:01:00.0: new USB bus registered, assigned bus number 5 > Jan 12 14:15:13 heisenberg kernel: xhci_hcd 0000:01:00.0: hcc params 0x014042cb hci version 0x96 quirks 0x00000004 > Jan 12 14:15:13 heisenberg kernel: usb usb5: New USB device found, idVendor=1d6b, idProduct=0002 > Jan 12 14:15:13 heisenberg kernel: usb usb5: New USB device strings: Mfr=3, Product=2, SerialNumber=1 > Jan 12 14:15:13 heisenberg kernel: usb usb5: Product: xHCI Host Controller > Jan 12 14:15:13 heisenberg kernel: usb usb5: Manufacturer: Linux 4.8.0-2-amd64 xhci-hcd > Jan 12 14:15:13 heisenberg kernel: usb usb5: SerialNumber: 0000:01:00.0 > Jan 12 14:15:13 heisenberg kernel: hub 5-0:1.0: USB hub found > Jan 12 14:15:13 heisenberg kernel: hub 5-0:1.0: 2 ports detected > Jan 12 14:15:13 heisenberg kernel: xhci_hcd 0000:01:00.0: xHCI Host Controller > Jan 12 14:15:13 heisenberg kernel: xhci_hcd 0000:01:00.0: new USB bus registered, assigned bus number 6 > Jan 12 14:15:13 heisenberg kernel: usb usb6: We don't know the algorithms for LPM for this host, disabling LPM. > Jan 12 14:15:13 heisenberg kernel: usb usb6: New USB device found, idVendor=1d6b, idProduct=0003 > Jan 12 14:15:13 heisenberg kernel: usb usb6: New USB device strings: Mfr=3, Product=2, SerialNumber=1 > Jan 12 14:15:13 heisenberg kernel: usb usb6: Product: xHCI Host Controller > Jan 12 14:15:13 heisenberg kernel: usb usb6: Manufacturer: Linux 4.8.0-2-amd64 xhci-hcd > Jan 12 14:15:13 heisenberg kernel: usb usb6: SerialNumber: 0000:01:00.0 > Jan 12 14:15:13 heisenberg kernel: hub 6-0:1.0: USB hub found > Jan 12 14:15:13 heisenberg kernel: hub 6-0:1.0: 2 ports detected > Jan 12 14:15:15 heisenberg kernel: hub 6-0:1.0: USB hub found > Jan 12 14:15:15 heisenberg kernel: hub 6-0:1.0: 2 ports detected > Jan 12 14:15:15 heisenberg kernel: usb usb6: authorized to connect > Jan 12 14:15:16 heisenberg kernel: hub 5-0:1.0: USB hub found > Jan 12 14:15:16 heisenberg kernel: hub 5-0:1.0: 2 ports detected > Jan 12 14:15:16 heisenberg kernel: usb usb5: authorized to connect > > > then top shows this kworker, which remains at ~75% CPU until reboot: > 2359 root 20 0 0 0 0 R 74,8 0,0 0:46.82 kworker/0:3 > > # perf top -p 2359 gives something like that: > Samples: 64K of event 'cycles:ppp', Event count (approx.): 19127246624 > Overhead Shared Object Symbol > 19,91% [kernel] [k] acpi_ns_search_one_scope > 11,18% [kernel] [k] acpi_os_write_port > 8,51% [kernel] [k] pci_conf1_read > 7,59% [kernel] [k] acpi_ex_system_memory_space_handler > 3,57% [kernel] [k] acpi_os_read_port > 2,84% [kernel] [k] kmem_cache_alloc > 2,27% [kernel] [k] acpi_ut_get_next_predefined_method > 1,96% [kernel] [k] nmi Looks like acpi is going crazy, maybe lots of different ACPI events? Have you asked the ACPI developers about this? thanks, greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
