f2fs: readahead contiguous SSA blocks for f2fs_gc
If there are multi segments in one section, we will read those SSA blocks which
have contiguous address one by one in f2fs_gc. It may lost performance, let's
read ahead SSA blocks by merge multi read request.
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 757b77b..c8516ee 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -82,6 +82,7 @@
return NM_I(sbi)->max_nid / NAT_ENTRY_PER_BLOCK;
case META_SIT:
return SIT_BLK_CNT(sbi);
+ case META_SSA:
case META_CP:
return 0;
default:
@@ -90,7 +91,7 @@
}
/*
- * Readahead CP/NAT/SIT pages
+ * Readahead CP/NAT/SIT/SSA pages
*/
int ra_meta_pages(struct f2fs_sb_info *sbi, int start, int nrpages, int type)
{
@@ -125,8 +126,9 @@
goto out;
prev_blk_addr = blk_addr;
break;
+ case META_SSA:
case META_CP:
- /* get cp block addr */
+ /* get ssa/cp block addr */
blk_addr = blkno;
break;
default: