JC6-defrag-alloc-contiguous-blks-credit

   1 This patch should be merged with ext4-online-defrag-alloc-contiguous-blks.patch
   2
   3 It originally came from ext4_journal_credits_fix_for_writepages.patch,
   4 but was split off when this patch was moved into the stable part of
   5 the patch queue.
   6
   7 Cc: Akira Fujita <a-fujita@rs.jp.nec.com>
   8 Cc: Takashi Sato <t-sato@yk.jp.nec.com>
   9 Signed-off-by: Mingming Cao <cmm@us.ibm.com>
  10 Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
  11 ---
  12 Index: linux-2.6.27-rc1/fs/ext4/defrag.c
  13 ===================================================================
  14 --- linux-2.6.27-rc1.orig/fs/ext4/defrag.c      2008-08-11 17:15:49.000000000 -0700
  15 +++ linux-2.6.27-rc1/fs/ext4/defrag.c   2008-08-11 19:46:59.000000000 -0700
  16 @@ -186,9 +186,9 @@ ext4_defrag_alloc_blocks(handle_t *handl
  17         struct buffer_head *bh = NULL;
  18         int err, i, credits = 0;
  19
  20 -       credits = ext4_ext_calc_credits_for_insert(dest_inode, dest_path);
  21 -       err = ext4_ext_journal_restart(handle,
  22 -                               credits + EXT4_TRANS_META_BLOCKS);
  23 +       credits = ext4_ext_calc_credits_for_single_extent(dest_inode,
  24 +                                                         ar->len, dest_path);
  25 +       err = ext4_ext_journal_restart(handle, credits);
  26         if (err)
  27                 return err;
  28
  29
  30
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