git: hammer2 - work on bmap->avail tracking, fix DIO issue w/block reuse

[Matthew Dillon]

commit 271568b17008871f333ec935d8d76c8d92083592
Author: Matthew Dillon <dillon at apollo.backplane.com>
Date:   Thu Jan 29 10:21:46 2015 -0800

    hammer2 - work on bmap->avail tracking, fix DIO issue w/block reuse
    
    * Start working on tracking bmap->avail in a way that the bulkfree
      code can undo.
    
    * DIO was allowing mixed 16/64K buffers, but bulkfree doesn't invalidate
      cached DIOs and the re-use case might want a larger buffer.  For now
      deal with it by just having DIO use 64K buffers.

Summary of changes:
 sys/vfs/hammer2/hammer2_bulkscan.c |  31 ++++++++---
 sys/vfs/hammer2/hammer2_freemap.c  | 105 +++++++++++++++++++++++++++++++------
 sys/vfs/hammer2/hammer2_io.c       |   9 +++-
 3 files changed, 121 insertions(+), 24 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/271568b17008871f333ec935d8d76c8d92083592


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