tree f031e26f195e77b8e49e37a86dbf96af5436b6f0
parent d6c67a4fee866ad95fe1d727f80a56f956737706
author Jaegeuk Kim <jaegeuk@kernel.org> 1430458670 -0700
committer Jaegeuk Kim <jaegeuk@kernel.org> 1432852899 -0700

f2fs: introduce discard_map for f2fs_trim_fs

This patch adds a bitmap for discard issues from f2fs_trim_fs.
There-in rule is to issue discard commands only for invalidated blocks
after mount.
Once mount is done, f2fs_trim_fs trims out whole invalid area.
After ehn, it will not issue and discrads redundantly.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>