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| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2015-05-11 20:03:49 -0700 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2015-06-01 16:20:50 -0700 |
| commit | 40a02be1781f726ee015bcf7c8961a71a2a50f05 (patch) | |
| tree | b8e11bd1c98bd2c78500663974ed6303d5d7642b /fs/f2fs | |
| parent | 498c5e9fcd10c89404601b222c1dbcb6e4f10a02 (diff) | |
| download | blackbird-op-linux-40a02be1781f726ee015bcf7c8961a71a2a50f05.tar.gz blackbird-op-linux-40a02be1781f726ee015bcf7c8961a71a2a50f05.zip | |
f2fs: do not issue next dnode discard redundantly
We have a discard map, so that we can avoid redundant discard issues.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
| -rw-r--r-- | fs/f2fs/segment.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index 2c40ce132895..342e0f761d8f 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -486,7 +486,20 @@ static int f2fs_issue_discard(struct f2fs_sb_info *sbi, void discard_next_dnode(struct f2fs_sb_info *sbi, block_t blkaddr) { - if (f2fs_issue_discard(sbi, blkaddr, 1)) { + int err = -ENOTSUPP; + + if (test_opt(sbi, DISCARD)) { + struct seg_entry *se = get_seg_entry(sbi, + GET_SEGNO(sbi, blkaddr)); + unsigned int offset = GET_BLKOFF_FROM_SEG0(sbi, blkaddr); + + if (f2fs_test_bit(offset, se->discard_map)) + return; + + err = f2fs_issue_discard(sbi, blkaddr, 1); + } + + if (err) { struct page *page = grab_meta_page(sbi, blkaddr); /* zero-filled page */ set_page_dirty(page); |
