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[god <1505957@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

This is trivial to reproduce - just plug any external drive with ntfs
and copy smth substantial to local ntfs partition. The result - mouse
doesn't even move most of the time, the system is useless and
unresponsive until copying is finished.

Yes, ntfs is not native on GNU/Linux but nevertheless - this is very
common task on loads of dual boot installations. And under no
circumstances it should make ubuntu useless as it does now. I don't care
much if copying big files to/from ntfs takes 5 or 10 minutes as long as
I can actually keep using ubuntu in a meantime.

Note the same effect can be observer while copying between ntfs and ext4
or btrfs - only in this case you can sometimes move mouse pointer a bit.

I hope that using BFQ http://algo.ing.unimo.it/people/paolo/disk_sched/
and some of systemd magic might help in this case.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Incomplete

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https://bugs.launchpad.net/bugs/1505957

Title:
  ntfs copy kills ubuntu

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  This is trivial to reproduce - just plug any external drive with ntfs
  and copy smth substantial to local ntfs partition. The result - mouse
  doesn't even move most of the time, the system is useless and
  unresponsive until copying is finished.

  Yes, ntfs is not native on GNU/Linux but nevertheless - this is very
  common task on loads of dual boot installations. And under no
  circumstances it should make ubuntu useless as it does now. I don't
  care much if copying big files to/from ntfs takes 5 or 10 minutes as
  long as I can actually keep using ubuntu in a meantime.

  Note the same effect can be observer while copying between ntfs and
  ext4 or btrfs - only in this case you can sometimes move mouse pointer
  a bit.

  I hope that using BFQ
  http://algo.ing.unimo.it/people/paolo/disk_sched/ and some of systemd
  magic might help in this case.

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