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[Chris J Arges <1385123@xxxxxxxxxxxxxxxxxx>]

*** This bug is a duplicate of bug 1346687 ***
    https://bugs.launchpad.net/bugs/1346687

** This bug has been marked a duplicate of bug 1346687
   Ubuntu 14 KVM Guest I/O Elevator Non-configurable

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https://bugs.launchpad.net/bugs/1385123

Title:
  ubuntu 3.13.0-32-generic kernel IO problem

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  1、Cannot set IO scheduler   
  root@VM-132-36-ubuntu:~# echo "deadline" > /sys/block/vda/queue/scheduler               
  root@VM-132-36-ubuntu:~# cat /sys/block/vda/queue/scheduler                             
  none
  2、iostat display high iowait 
  avg-cpu:  %user   %nice %system %iowait  %steal   %idle
             0.09    0.00    0.13    0.15    0.00   99.62

  Device:         rrqm/s   wrqm/s     r/s     w/s    rkB/s    wkB/s avgrq-sz avgqu-sz   await r_await w_await  svctm  %util
  vda               0.07     0.61    0.77    0.61    15.21    14.03    42.26     0.01 22228.49 23156.92 21049.84   1.47   0.20
  vdb               0.00     0.00    0.02    0.00     0.07     0.00     8.38     0.00  109.49  109.49    0.00   1.99   0.00
  --- 
  AlsaDevices:
   total 0
   crw-rw---T 1 root audio 116,  1 Oct 24 09:12 seq
   crw-rw---T 1 root audio 116, 33 Oct 24 09:12 timer
  AplayDevices: Error: [Errno 2] No such file or directory
  ApportVersion: 2.0.1-0ubuntu17.6
  Architecture: amd64
  ArecordDevices: Error: [Errno 2] No such file or directory
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  CRDA: Error: [Errno 2] No such file or directory
  CurrentDmesg: [  574.330919] EXT4-fs error (device vda1): ext4_mb_generate_buddy:756: group 51, 27286 clusters in bitmap, 27290 in gd; block bitmap corrupt.
  DistroRelease: Ubuntu 12.04
  HibernationDevice: RESUME=UUID=4cdfdaf0-31b3-41ba-834c-a838a68e6a1a
  IwConfig: Error: [Errno 2] No such file or directory
  Lsusb: Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
  MachineType: Bochs Bochs
  MarkForUpload: True
  Package: linux (not installed)
  PciMultimedia:
   
  ProcEnviron:
   TERM=linux
   SHELL=/bin/bash
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   LANGUAGE=en_US:
  ProcFB: 0 cirrusdrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-32-generic root=UUID=c1ac9522-d89a-464d-b100-a3b761ab4de7 ro splash quiet
  ProcVersionSignature: Ubuntu 3.13.0-32.57~precise1-generic 3.13.11.4
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-32-generic N/A
   linux-backports-modules-3.13.0-32-generic  N/A
   linux-firmware                             1.79.1
  RfKill: Error: [Errno 2] No such file or directory
  Tags:  precise
  Uname: Linux 3.13.0-32-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:
   
  dmi.bios.date: 01/01/2011
  dmi.bios.vendor: Bochs
  dmi.bios.version: Bochs
  dmi.chassis.type: 1
  dmi.chassis.vendor: Bochs
  dmi.modalias: dmi:bvnBochs:bvrBochs:bd01/01/2011:svnBochs:pnBochs:pvr:cvnBochs:ct1:cvr:
  dmi.product.name: Bochs
  dmi.sys.vendor: Bochs

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