Commit 2223fe65 authored by Daeho Jeong's avatar Daeho Jeong Committed by Jaegeuk Kim
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f2fs: increase BG GC migration window granularity when boosted for zoned devices 



Need bigger BG GC migration window granularity when free section is
running low.

Signed-off-by: default avatarDaeho Jeong <daehojeong@google.com>
Reviewed-by: default avatarChao Yu <chao@kernel.org>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 4cdca5a9

fs/f2fs/gc.c

+10 −2
Original line number Diff line number Diff line
@@ -1728,10 +1728,18 @@ static int do_garbage_collect(struct f2fs_sb_info *sbi, 
			sec_end_segno -= SEGS_PER_SEC(sbi) -

					f2fs_usable_segs_in_sec(sbi, segno);



		if (gc_type == BG_GC)

			end_segno = start_segno +

		if (gc_type == BG_GC) {

			unsigned int window_granularity =

				sbi->migration_window_granularity;



			if (f2fs_sb_has_blkzoned(sbi) &&

					!has_enough_free_blocks(sbi,

					LIMIT_BOOST_ZONED_GC))

				window_granularity *= BOOST_GC_MULTIPLE;



			end_segno = start_segno + window_granularity;

		}



		if (end_segno > sec_end_segno)

			end_segno = sec_end_segno;

	}

fs/f2fs/gc.h

+1 −0
Original line number Diff line number Diff line
@@ -33,6 +33,7 @@ 
#define LIMIT_NO_ZONED_GC	60 /* percentage over total user space of no gc for zoned devices */

#define LIMIT_BOOST_ZONED_GC	25 /* percentage over total user space of boosted gc for zoned devices */

#define DEF_MIGRATION_WINDOW_GRANULARITY_ZONED	3

#define BOOST_GC_MULTIPLE	5



#define DEF_GC_FAILED_PINNED_FILES	2048

#define MAX_GC_FAILED_PINNED_FILES	USHRT_MAX