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f2fs: fix to issue small discard in real-time mode discard 

Now in f2fs, we share functions and structures for batch mode and real-time mode
discard. For real-time mode discard, in shared function add_discard_addrs, we
will use uninitialized trim_minlen in struct cp_control to compare with length
of contiguous free blocks to decide whether skipping discard fragmented freespace
or not, this makes us ignore small discard sometimes. Fix it.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Reviewed-by : Changman Lee <cm224.lee@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2015-02-28 17:23:30 +08:00 committed by Jaegeuk Kim
parent 7ecebe5e07
commit b28c3f9493
1 changed files with 1 additions and 1 deletions
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2
fs/f2fs/segment.c
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@ -552,7 +552,7 @@ static void add_discard_addrs(struct f2fs_sb_info *sbi, struct cp_control *cpc)
end = __find_rev_next_zero_bit(dmap, max_blocks, start + 1);
if (end - start < cpc->trim_minlen)
if (force && end - start < cpc->trim_minlen)
continue;
__add_discard_entry(sbi, cpc, start, end);