tree 142a0cc20bad24bd9e00c92380f206c34797085a
parent d838f79e7f8c77fa9d5a71eb5e805644cded6607
author Jin Qian <jinqian@google.com> 1482173600 -0800
committer Theodore Ts'o <tytso@mit.edu> 1495594236 -0400

AOSP: libext2fs: merge contiguous data blocks when writing to sparse file

Sparse IO manager allocates one block at a time. This creates many
blocks in sparse file even though most of them are contiguous. As a
result, fastboot is extremely slow writing that many blocks. Merging
contiguous blocks reduces block count and flash time significantly.

Change-Id: I211312d24d7423c7f160ee501fe8b62ddf14a847
From AOSP commit: 6ef6efab23203e967625160e6af4140954e15e91

Signed-off-by: Theodore Ts'o <tytso@mit.edu>