mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity

f2fs: shrink size of struct seg_entry 

Restructure struct seg_entry to eliminate holes in it, after that,
in 32-bits machine, it reduces size from 32 bytes to 24 bytes; in
64-bits machine, it reduces size from 56 bytes to 40 bytes.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2016-05-04 23:19:48 +08:00 committed by Jaegeuk Kim
parent bd933d4fae
commit f51b4ce6c1
1 changed files with 5 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
fs/f2fs/segment.h
View File

@ -158,16 +158,17 @@ struct victim_sel_policy {
};
struct seg_entry {
unsigned short valid_blocks; /* # of valid blocks */
unsigned int type:6; /* segment type like CURSEG_XXX_TYPE */
unsigned int valid_blocks:10; /* # of valid blocks */
unsigned int ckpt_valid_blocks:10; /* # of valid blocks last cp */
unsigned int padding:6; /* padding */
unsigned char *cur_valid_map; /* validity bitmap of blocks */
/*
* # of valid blocks and the validity bitmap stored in the the last
* checkpoint pack. This information is used by the SSR mode.
*/
unsigned short ckpt_valid_blocks;
unsigned char *ckpt_valid_map;
unsigned char *ckpt_valid_map; /* validity bitmap of blocks last cp */
unsigned char *discard_map;
unsigned char type; /* segment type like CURSEG_XXX_TYPE */
unsigned long long mtime; /* modification time of the segment */
};