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| author | Chao Yu <chao2.yu@samsung.com> | 2015-09-17 20:22:44 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2015-10-09 16:20:52 -0700 |
| commit | ea58711e884c3006e6f61e44d47f0c2d9f0979e1 (patch) | |
| tree | a2158dd4c7a123ebf2d815292682d6cd41516381 /fs/f2fs | |
| parent | 4d1fa815f26ce92dc4710d28f50071174a2340b7 (diff) | |
| download | linux-ea58711e884c3006e6f61e44d47f0c2d9f0979e1.tar.bz2 | |
f2fs: do in batches truncation in truncate_hole
truncate_data_blocks_range can do in batches truncation which makes all
changes in dnode page content, dnode page status, extent cache, block
count updating together.
But previously, truncate_hole() always truncates one block in dnode page
at a time by invoking truncate_data_blocks_range(,1), which make thing
slow.
This patch changes truncate_hole() to do in batches truncation for all
target blocks in one direct node inside truncate_data_blocks_range, which
can make our punch hole operation in ->fallocate more efficent.
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
| -rw-r--r-- | fs/f2fs/file.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index 27a789c0d3c2..6702157801a6 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -739,23 +739,31 @@ static int fill_zero(struct inode *inode, pgoff_t index, int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end) { - pgoff_t index; int err; - for (index = pg_start; index < pg_end; index++) { + while (pg_start < pg_end) { struct dnode_of_data dn; + pgoff_t end_offset, count; set_new_dnode(&dn, inode, NULL, NULL, 0); - err = get_dnode_of_data(&dn, index, LOOKUP_NODE); + err = get_dnode_of_data(&dn, pg_start, LOOKUP_NODE); if (err) { - if (err == -ENOENT) + if (err == -ENOENT) { + pg_start++; continue; + } return err; } - if (dn.data_blkaddr != NULL_ADDR) - truncate_data_blocks_range(&dn, 1); + end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); + count = min(end_offset - dn.ofs_in_node, pg_end - pg_start); + + f2fs_bug_on(F2FS_I_SB(inode), count == 0 || count > end_offset); + + truncate_data_blocks_range(&dn, count); f2fs_put_dnode(&dn); + + pg_start += count; } return 0; } |