diff options
| author |   Chao Yu <chao2.yu@samsung.com> | 2016-01-26 15:42:58 +0800 |
|---|---|---|
| committer |   Jaegeuk Kim <jaegeuk@kernel.org> | 2016-02-22 16:07:23 -0800 |
| commit | da85985c6142decea67ee5ff67eadf3f13103a91 (patch) | |
| tree | 3a8b2b04014b0cd73270e61f94625353769171b4 /include/linux/f2fs_fs.h | |
| parent | f2fs: introduce get_next_page_offset to speed up SEEK_DATA (diff) | |
| download | linux-dev-da85985c6142decea67ee5ff67eadf3f13103a91.tar.xz linux-dev-da85985c6142decea67ee5ff67eadf3f13103a91.zip | |
f2fs: speed up handling holes in fiemap
This patch makes f2fs_map_blocks supporting returning next potential
page offset which skips hole region in indirect tree of inode, and
use it to speed up fiemap in handling big hole case.
Test method:
xfs_io -f /mnt/f2fs/file -c "pwrite 1099511627776 4096"
time xfs_io -f /mnt/f2fs/file -c "fiemap -v"
Before:
time xfs_io -f /mnt/f2fs/file -c "fiemap -v"
/mnt/f2fs/file:
EXT: FILE-OFFSET BLOCK-RANGE TOTAL FLAGS
0: [0..2147483647]: hole 2147483648
1: [2147483648..2147483655]: 81920..81927 8 0x1
real 3m3.518s
user 0m0.000s
sys 3m3.456s
After:
time xfs_io -f /mnt/f2fs/file -c "fiemap -v"
/mnt/f2fs/file:
EXT: FILE-OFFSET BLOCK-RANGE TOTAL FLAGS
0: [0..2147483647]: hole 2147483648
1: [2147483648..2147483655]: 81920..81927 8 0x1
real 0m0.008s
user 0m0.000s
sys 0m0.008s
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'include/linux/f2fs_fs.h')
0 files changed, 0 insertions, 0 deletions