Commit 0ab14356 authored Jan 22, 2016 by Chao Yu Committed by Jaegeuk Kim Feb 22, 2016

f2fs: correct search area in get_new_segment

get_new_segment starts from current segment position, tries to search a
free segment among its right neighbors locate in same section.

But previously our search area was set as [current segment, max segment],
which means we have to search to more bits in free_segmap bitmap for some
worse cases. So here we correct the search area to [current segment, last
segment in section] to avoid unnecessary searching.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

parent 2304cb0c

fs/f2fs/segment.c

+2 −3

Original line number	Diff line number	Diff line
		@@ -874,9 +874,8 @@ static void get_new_segment(struct f2fs_sb_info *sbi,

		if (!new_sec && ((*newseg + 1) % sbi->segs_per_sec)) {
		segno = find_next_zero_bit(free_i->free_segmap,
		MAIN_SEGS(sbi), *newseg + 1);
		if (segno - *newseg < sbi->segs_per_sec -
		(*newseg % sbi->segs_per_sec))
		(hint + 1) * sbi->segs_per_sec, *newseg + 1);
		if (segno < (hint + 1) * sbi->segs_per_sec)
		goto got_it;
		}
		find_other_zone:

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