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| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2017-02-27 19:57:11 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-03-12 05:41:51 (GMT) |
| commit | 8c53efc399565ef4be8945c9bf45c94153699221 (patch) | |
| tree | 682254009a05ad494d229ff7f35bb77cff9aea8e /fs | |
| parent | 4992ba2840bd40a85887a1a0e5d69f688f58f9dd (diff) | |
| download | linux-8c53efc399565ef4be8945c9bf45c94153699221.tar.xz | |
f2fs: avoid to issue redundant discard commands
commit 8b107f5b97772c7c0c218302e9a4d15b4edf50b4 upstream.
If segs_per_sec is over 1 like under SMR, previously f2fs issues discard
commands redundantly on the same section, since we didn't move end position
for the previous discard command.
E.g.,
start end
| |
prefree_bitmap = [01111100111100]
And, after issue discard for this section,
end start
| |
prefree_bitmap = [01111100111100]
Select this section again by searching from (end + 1),
start end
| |
prefree_bitmap = [01111100111100]
Fixes: 36abef4e796d38 ("f2fs: introduce mode=lfs mount option")
Cc: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/f2fs/segment.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index fc886f0..a7943f8 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -813,6 +813,8 @@ next: start = start_segno + sbi->segs_per_sec; if (start < end) goto next; + else + end = start - 1; } mutex_unlock(&dirty_i->seglist_lock); |