diff options
Diffstat (limited to 'meta/recipes-devtools/e2fsprogs/e2fsprogs/cache_inode.patch')
| -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 @@ +The comment to this function says: + +""" + * Stupid algorithm --- we now just search forward starting from the + * goal. Should put in a smarter one someday.... +""" + +This adds in a rather hacky algorthim which starts where we finished +searching previously using a static variable rather than starting +from scratch if a hint isn't provided. + +This was after noticing that mkfs.ext4 -F X -d Y was spending *lots* +of time in ext2fs_new_block2 called from ext2fs_bmap from ext2fs_file_write(). + +Numbers wise, this took a core-image-sato-sdk mkfs time from over +8 minutes to around 35 seconds. + +Upstream-Status: Pending + +RP 2015/02/20 + +Index: e2fsprogs-1.42.9/lib/ext2fs/alloc.c +=================================================================== +--- e2fsprogs-1.42.9.orig/lib/ext2fs/alloc.c ++++ e2fsprogs-1.42.9/lib/ext2fs/alloc.c +@@ -160,6 +160,8 @@ errcode_t ext2fs_new_inode(ext2_filsys f + return 0; + } + ++static blk64_t last_goal = 0; ++ + /* + * Stupid algorithm --- we now just search forward starting from the + * goal. Should put in a smarter one someday.... +@@ -170,6 +172,9 @@ errcode_t ext2fs_new_block2(ext2_filsys + blk64_t i; + int c_ratio; + ++ if (!goal) ++ goal = last_goal; ++ + EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS); + + if (!map) +@@ -194,6 +199,7 @@ errcode_t ext2fs_new_block2(ext2_filsys + + if (!ext2fs_fast_test_block_bitmap2(map, i)) { + *ret = i; ++ last_goal = i; + return 0; + } + i = (i + c_ratio) & ~(c_ratio - 1); |