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Date: Mon, 24 Oct 2022 13:29:06 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Aran Dalton <arda@...winnertech.com>, Chao Yu <chao@...nel.org>, Jaegeuk Kim <jaegeuk@...nel.org> Subject: [PATCH 5.4 036/255] f2fs: increase the limit for reserve_root From: Jaegeuk Kim <jaegeuk@...nel.org> commit da35fe96d12d15779f3cb74929b7ed03941cf983 upstream. 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. Cc: stable@...r.kernel.org Reported-by: Aran Dalton <arda@...winnertech.com> Reviewed-by: Chao Yu <chao@...nel.org> Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- fs/f2fs/super.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -255,10 +255,10 @@ static int f2fs_sb_read_encoding(const s 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;
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