diff options
Diffstat (limited to 'meta/recipes-devtools/e2fsprogs/e2fsprogs')
-rw-r--r-- | meta/recipes-devtools/e2fsprogs/e2fsprogs/cache_inode.patch | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/meta/recipes-devtools/e2fsprogs/e2fsprogs/cache_inode.patch b/meta/recipes-devtools/e2fsprogs/e2fsprogs/cache_inode.patch new file mode 100644 index 0000000000..f9ef8e5f26 --- /dev/null +++ b/meta/recipes-devtools/e2fsprogs/e2fsprogs/cache_inode.patch | |||
@@ -0,0 +1,52 @@ | |||
1 | The comment to this function says: | ||
2 | |||
3 | """ | ||
4 | * Stupid algorithm --- we now just search forward starting from the | ||
5 | * goal. Should put in a smarter one someday.... | ||
6 | """ | ||
7 | |||
8 | This adds in a rather hacky algorthim which starts where we finished | ||
9 | searching previously using a static variable rather than starting | ||
10 | from scratch if a hint isn't provided. | ||
11 | |||
12 | This was after noticing that mkfs.ext4 -F X -d Y was spending *lots* | ||
13 | of time in ext2fs_new_block2 called from ext2fs_bmap from ext2fs_file_write(). | ||
14 | |||
15 | Numbers wise, this took a core-image-sato-sdk mkfs time from over | ||
16 | 8 minutes to around 35 seconds. | ||
17 | |||
18 | Upstream-Status: Pending | ||
19 | |||
20 | RP 2015/02/20 | ||
21 | |||
22 | Index: e2fsprogs-1.42.9/lib/ext2fs/alloc.c | ||
23 | =================================================================== | ||
24 | --- e2fsprogs-1.42.9.orig/lib/ext2fs/alloc.c | ||
25 | +++ e2fsprogs-1.42.9/lib/ext2fs/alloc.c | ||
26 | @@ -160,6 +160,8 @@ errcode_t ext2fs_new_inode(ext2_filsys f | ||
27 | return 0; | ||
28 | } | ||
29 | |||
30 | +static blk64_t last_goal = 0; | ||
31 | + | ||
32 | /* | ||
33 | * Stupid algorithm --- we now just search forward starting from the | ||
34 | * goal. Should put in a smarter one someday.... | ||
35 | @@ -170,6 +172,9 @@ errcode_t ext2fs_new_block2(ext2_filsys | ||
36 | blk64_t i; | ||
37 | int c_ratio; | ||
38 | |||
39 | + if (!goal) | ||
40 | + goal = last_goal; | ||
41 | + | ||
42 | EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS); | ||
43 | |||
44 | if (!map) | ||
45 | @@ -194,6 +199,7 @@ errcode_t ext2fs_new_block2(ext2_filsys | ||
46 | |||
47 | if (!ext2fs_fast_test_block_bitmap2(map, i)) { | ||
48 | *ret = i; | ||
49 | + last_goal = i; | ||
50 | return 0; | ||
51 | } | ||
52 | i = (i + c_ratio) & ~(c_ratio - 1); | ||