This patch increases the threshold that limits the reserved root space from 0.2%
to 12.5% by using simple shift operation.

Typically Android sets 128MB, but if the storage capacity is 32GB, 0.2% which is
around 64MB becomes too small. Let's relax it.

Signed-off-by: Jaegeuk Kim <jaeg...@kernel.org>
---
 fs/f2fs/super.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 09972b709cdd..d1b4de5b4083 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -301,10 +301,10 @@ static void f2fs_destroy_casefold_cache(void) { }
 
 static inline void limit_reserve_root(struct f2fs_sb_info *sbi)
 {
-       block_t limit = min((sbi->user_block_count << 1) / 1000,
+       block_t limit = min((sbi->user_block_count >> 3),
                        sbi->user_block_count - sbi->reserved_blocks);
 
-       /* limit is 0.2% */
+       /* limit is 12.5% */
        if (test_opt(sbi, RESERVE_ROOT) &&
                        F2FS_OPTION(sbi).root_reserved_blocks > limit) {
                F2FS_OPTION(sbi).root_reserved_blocks = limit;
-- 
2.37.1.595.g718a3a8f04-goog



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