git: kernel - Fix incorrect assertion in ffs_reallocblks()

[Matthew Dillon]

commit e3fc69eb7932705c4ac3ff97665b59d2d8106992
Author: Matthew Dillon <dillon at apollo.backplane.com>
Date:   Sat Dec 27 14:44:14 2014 -0800

    kernel - Fix incorrect assertion in ffs_reallocblks()
    
    * When softupdates is not enabled reallocblks should not try to free
      an unallocated block.  This appears to be possible if the reallocation
      range covers part of a file with a hole in it.  FSX appears to reveal
      this case.
    
    * It is also possible that this case is due to some interaction between
      the DragonFly buffer cache and UFS that breaks b_offset assignment
      assumptions made by UFS, but I couldn't find any particular vector
      for the possibility.

Summary of changes:
 sys/vfs/ufs/ffs_alloc.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/e3fc69eb7932705c4ac3ff97665b59d2d8106992


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