[Bug 554764] Re: ntfs-3g high cpu usage & slow write speed

[laulau]

*** This bug is a duplicate of bug 392204 ***
    https://bugs.launchpad.net/bugs/392204

bug still exists on 13.04 amd64.

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https://bugs.launchpad.net/bugs/554764

Title:
  ntfs-3g high cpu usage & slow write speed

Status in “ntfs-3g” package in Ubuntu:
  New

Bug description:
  Binary package hint: ntfs-3g

  When writing to an NTFS partition a few seconds after starting the operation the CPU usage of the process /sbin/mount.ntfs jumps up (to ~100% on one core) and remains unchanged until the write operation stops. I confirmed this pretty accurately with iotop: when pausing a copying as soon as the buffers get flushed the CPU usage drops to 0.
  Also, as soon as the CPU usage of ntfs.mount hits the ~100% the write speed drops to a dreadful few hundred KiB/s.

  The above bug is not 100% reproducible, the file written has to be
  large enough (in my case the initial ~20 MiB/s write speed drops to
  below 1MiB/s in about 15-20s).

  ProblemType: Bug
  Architecture: i386
  Date: Sat Apr  3 21:06:54 2010
  DistroRelease: Ubuntu 9.10
  ExecutablePath: /bin/ntfs-3g
  Package: ntfs-3g 1:2009.4.4-1ubuntu4
  ProcEnviron:

  ProcVersionSignature: Ubuntu 2.6.31-20.58-generic
  SourcePackage: ntfs-3g
  Uname: Linux 2.6.31-20-generic i686

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