From 079396270b0f1e98496ef7672dd754bdd42574dc Mon Sep 17 00:00:00 2001 From: Jaegeuk Kim Date: Sun, 18 Feb 2018 08:50:49 -0800 Subject: f2fs: add mount option for segment allocation policy This patch adds an mount option, "alloc_mode=%s" having two options, "default" and "reuse". In "alloc_mode=reuse" case, f2fs starts to allocate segments from 0'th segment all the time to reassign segments. It'd be useful for small-sized eMMC parts. Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim --- fs/f2fs/segment.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'fs/f2fs/segment.c') diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index 0646d5de8cd0..5e5e2936a26a 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -2170,6 +2170,11 @@ static unsigned int __get_next_segno(struct f2fs_sb_info *sbi, int type) if (SIT_I(sbi)->last_victim[ALLOC_NEXT]) return SIT_I(sbi)->last_victim[ALLOC_NEXT]; + + /* find segments from 0 to reuse freed segments */ + if (sbi->alloc_mode == ALLOC_MODE_REUSE) + return 0; + return CURSEG_I(sbi, type)->segno; } -- cgit v1.2.3