[PATCH 3/5] mballoc: add comments to ext4_mb_mark_free_simple()
From: Coly Li <hidden>
Date: 2011-02-06 04:27:35
Subsystem:
ext4 file system, filesystems (vfs and infrastructure), the rest · Maintainers:
"Theodore Ts'o", Alexander Viro, Christian Brauner, Linus Torvalds
This patch tries to add comments to make ext4_mb_mark_free_simple more readable. Signed-off-by: Coly Li <redacted> Cc: Alex Tomas <redacted> Cc: Theodore Tso <redacted> --- fs/ext4/mballoc.c | 7 ++++++- 1 files changed, 6 insertions(+), 1 deletions(-)
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 458dce0..c5534f4 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c@@ -630,7 +630,12 @@ static int __mb_check_buddy(struct ext4_buddy *e4b, char *file, #define mb_check_buddy(e4b) #endif -/* FIXME!! need more doc */ +/* + * Devide blocks started from @first with length @len into + * smaller chunks with power of 2 blocks. + * Clear the bits in bitmap which the blocks of the chunk(s) covered, + * then increase bb_counters[] for corresponded chunk size. + */ static void ext4_mb_mark_free_simple(struct super_block *sb, void *buddy, ext4_grpblk_t first, ext4_grpblk_t len, struct ext4_group_info *grp)
--
1.7.3.4