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[Bug 1389043] Re: Copying to USB slows down whole system


Or could it be related to some bad parameters in sysctl.conf such a
parameters related to the dirty file cache?

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  Copying to USB slows down whole system

Status in “linux” package in Ubuntu:

Bug description:
  Each time I copy a movie to an USB stick, everything becomes slow.
  Mouse polling gets frozen. System becomes unstable until the copy
  process is complete.

  But the following dmesg output tells me something interesting:

      [ 7430.732424] usb 2-5: new high-speed USB device number 3 using ehci-pci
      [ 7430.938484] usb 2-5: New USB device found, idVendor=1b1c, idProduct=1ab1
      [ 7430.938488] usb 2-5: New USB device strings: Mfr=1, Product=2, SerialNumber=3
      [ 7430.938490] usb 2-5: Product: Voyager
      [ 7430.938492] usb 2-5: Manufacturer: Corsair
      [ 7430.938493] usb 2-5: SerialNumber: AA40000000000825
      [ 7430.960121] usb-storage 2-5:1.0: USB Mass Storage device detected
      [ 7430.960661] scsi12 : usb-storage 2-5:1.0
      [ 7430.960752] usbcore: registered new interface driver usb-storage
      [ 7430.962543] usbcore: registered new interface driver uas
      [ 7432.214019] scsi 12:0:0:0: Direct-Access     Corsair  Voyager          1100 PQ: 0     ANSI: 0 CCS
      [ 7432.214286] sd 12:0:0:0: Attached scsi generic sg5 type 0
      [ 7432.707330] sd 12:0:0:0: [sdd] 15663104 512-byte logical blocks: (8.01 GB/7.46     GiB)
      [ 7432.708416] sd 12:0:0:0: [sdd] Write Protect is off
      [ 7432.708420] sd 12:0:0:0: [sdd] Mode Sense: 43 00 00 00
      [ 7432.709552] sd 12:0:0:0: [sdd] No Caching mode page found
      [ 7432.709556] sd 12:0:0:0: [sdd] Assuming drive cache: write through
      [ 7432.714896]  sdd: sdd1
      [ 7432.718793] sd 12:0:0:0: [sdd] Attached SCSI removable disk

  This is interesting:

      [ 7432.709552] sd 12:0:0:0: [sdd] No Caching mode page found
      [ 7432.709556] sd 12:0:0:0: [sdd] Assuming drive cache: write through

  Any clues?

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: linux-image-3.16.0-24-generic 3.16.0-24.32
  ProcVersionSignature: Ubuntu 3.16.0-24.32-generic 3.16.4
  Uname: Linux 3.16.0-24-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.14.7-0ubuntu8
  Architecture: amd64
   /dev/snd/controlC2:  michael-heuberger   2171 F.... pulseaudio
   /dev/snd/controlC1:  michael-heuberger   2171 F.... pulseaudio
   /dev/snd/controlC0:  michael-heuberger   2171 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Tue Nov  4 15:26:38 2014
  HibernationDevice: RESUME=UUID=b0b47183-895a-4f27-bb25-40bd23028028
  InstallationDate: Installed on 2014-10-31 (3 days ago)
  InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
  MachineType: System manufacturer System Product Name
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-24-generic root=UUID=b5b38333-3694-4441-8a13-50bf4dbf2f41 ro quiet
   linux-restricted-modules-3.16.0-24-generic N/A
   linux-backports-modules-3.16.0-24-generic  N/A
   linux-firmware                             1.138
   0: phy0: Wireless LAN
   	Soft blocked: yes
   	Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/06/2012
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 0803
  dmi.board.asset.tag: To Be Filled By O.E.M.
  dmi.board.name: P6X58D-E
  dmi.board.vendor: ASUSTeK Computer INC.
  dmi.board.version: Rev 1.xx
  dmi.chassis.asset.tag: Asset-1234567890
  dmi.chassis.type: 3
  dmi.chassis.vendor: Chassis Manufacture
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0803:bd08/06/2012:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP6X58D-E:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
  dmi.product.name: System Product Name
  dmi.product.version: System Version
  dmi.sys.vendor: System manufacturer

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