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| author | Chao Yu <chao2.yu@samsung.com> | 2016-01-26 15:42:58 +0800 |
|---|---|---|
| committer | Mister Oyster <oysterized@gmail.com> | 2017-04-13 12:32:57 +0200 |
| commit | 1b7310623aff5ea29f11448788b8d63a9ffa3e53 (patch) | |
| tree | 01111411511b01512f546d750f5d4d1b29b0a242 /fs/f2fs/file.c | |
| parent | 5278cb948efdba8113d9a30766918685a41689d8 (diff) | |
| download | android_kernel_m2note-1b7310623aff5ea29f11448788b8d63a9ffa3e53.tar.gz | |
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 'fs/f2fs/file.c')
| -rw-r--r-- | fs/f2fs/file.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index 335d3db49..9302c2a74 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -1668,7 +1668,7 @@ static int f2fs_defragment_range(struct f2fs_sb_info *sbi, struct f2fs_defragment *range) { struct inode *inode = file_inode(filp); - struct f2fs_map_blocks map; + struct f2fs_map_blocks map = { .m_next_pgofs = NULL }; struct extent_info ei; pgoff_t pg_start, pg_end; unsigned int blk_per_seg = sbi->blocks_per_seg; |