[PATCH 6.10 285/482] f2fs: increase BG GC migration window granularity when boosted for zoned devices

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6.10-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Daeho Jeong <daehojeong@xxxxxxxxxx>

[ Upstream commit 2223fe652f759649ae1d520e47e5f06727c0acbd ]

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

Signed-off-by: Daeho Jeong <daehojeong@xxxxxxxxxx>
Reviewed-by: Chao Yu <chao@xxxxxxxxxx>
Signed-off-by: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
Stable-dep-of: 5cc69a27abfa ("f2fs: forcibly migrate to secure space for zoned device file pinning")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 fs/f2fs/gc.c | 12 ++++++++++--
 fs/f2fs/gc.h |  1 +
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index 0605f87d1aca4..e59a87dc5130b 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -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;
 	}
diff --git a/fs/f2fs/gc.h b/fs/f2fs/gc.h
index 245f93663745a..78abeebd68b5e 100644
--- a/fs/f2fs/gc.h
+++ b/fs/f2fs/gc.h
@@ -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
-- 
2.43.0







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