[Bug 205816] [ext2fs] [patch] EXT4 sparse blocks unsupported, contain garbage when read

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=205816

--- Comment #17 from commit-hook at freebsd.org ---
A commit references this bug:

Author: pfg
Date: Mon Jan 18 15:43:37 UTC 2016
New revision: 294273
URL: https://svnweb.freebsd.org/changeset/base/294273

Log:
  MFC   r293680
  ext4: add support for reading sparse files

  Add support for sparse files in ext4. Also implement read-ahead, which
  greatly increases the performance when transferring files from ext4.
  The sparse file support has become very common in ext4.

  Both features implemented by Damjan Jovanovic.

  PR:           205816

Changes:
_U  stable/9/sys/
_U  stable/9/sys/fs/
  stable/9/sys/fs/ext2fs/ext2_bmap.c
  stable/9/sys/fs/ext2fs/ext2_extents.c
  stable/9/sys/fs/ext2fs/ext2_extents.h
  stable/9/sys/fs/ext2fs/ext2_vnops.c

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