tree c4450c21bdbce0750543d8b1cd59992fb342a650
parent 9a26b66175e1c221f39bbe09e2e1d0a31a14ba6d
author Zheng Liu <wenqing.lz@taobao.com> 1352429852 -0500
committer Theodore Ts'o <tytso@mit.edu> 1352429852 -0500

ext4: let ext4 maintain extent status tree

This patch lets ext4 maintain extent status tree.

Currently it only tracks delay extent status in extent status tree.  When a
delay allocation is issued, the related delay extent will be inserted into
extent status tree.  When a delay extent is written out or invalidated, it will
be removed from this tree.

Signed-off-by: Yongqiang Yang <xiaoqiangnk@gmail.com>
Signed-off-by: Allison Henderson <achender@linux.vnet.ibm.com>
Signed-off-by: Zheng Liu <wenqing.lz@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>