From d0b9e42ab6155dc05fc83f00af9f45d4dd02264d Mon Sep 17 00:00:00 2001 From: Chao Yu Date: Tue, 4 Aug 2020 21:14:45 +0800 Subject: f2fs: introduce inmem curseg Previous implementation of aligned pinfile allocation will: - allocate new segment on cold data log no matter whether last used segment is partially used or not, it makes IOs more random; - force concurrent cold data/GCed IO going into warm data area, it can make a bad effect on hot/cold data separation; In this patch, we introduce a new type of log named 'inmem curseg', the differents from normal curseg is: - it reuses existed segment type (CURSEG_XXX_NODE/DATA); - it only exists in memory, its segno, blkofs, summary will not b persisted into checkpoint area; With this new feature, we can enhance scalability of log, special allocators can be created for purposes: - pure lfs allocator for aligned pinfile allocation or file defragmentation - pure ssr allocator for later feature So that, let's update aligned pinfile allocation to use this new inmem curseg fwk. Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim --- fs/f2fs/gc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs/f2fs/gc.c') diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c index 2232bcf344b6..4ac8ce6ac2a3 100644 --- a/fs/f2fs/gc.c +++ b/fs/f2fs/gc.c @@ -1463,7 +1463,7 @@ static int free_segment_range(struct f2fs_sb_info *sbi, mutex_unlock(&DIRTY_I(sbi)->seglist_lock); /* Move out cursegs from the target range */ - for (type = CURSEG_HOT_DATA; type < NR_CURSEG_TYPE; type++) + for (type = CURSEG_HOT_DATA; type < NR_CURSEG_PERSIST_TYPE; type++) f2fs_allocate_segment_for_resize(sbi, type, start, end); /* do GC to move out valid blocks in the range */ -- cgit v1.2.3