T12641: Refactor KFileProtocol::copy

[Méven Car]

meven added a comment.


  Found some hints how to help the kernel manage its buffers and page cache efficiently when writing
  http://lkml.iu.edu/hypermail/linux/kernel/1005.2/01845.html
  http://lkml.iu.edu/hypermail/linux/kernel/1005.2/01953.html
  
  Also additional fadvise might be worse testing.
  
    (void)posix_fadvise(fd, 0, 0, POSIX_FADV_WILLNEED);
    (void)posix_fadvise(fd, 0, 0, POSIX_FADV_SEQUENTIAL);
    (void)posix_fadvise(fd, 0, 0, POSIX_FADV_NOREUSE);
  
  In any case, I desperately need a benchmark tool as kioclient can't really play that role.
  Something that would link directly with file IOSLAVE.

TASK DETAIL
  https://phabricator.kde.org/T12641

To: meven
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