Commit ac2d750b authored Mar 17, 2021 by Weichao Guo Committed by Jaegeuk Kim Mar 25, 2021

f2fs: do not use AT_SSR mode in FG_GC & high urgent BG_GC



AT_SSR mode is introduced by age threshold based GC for better
hot/cold data seperation and avoiding free segment cost. However,
LFS write mode is preferred in the scenario of foreground or high
urgent GC, which should be finished ASAP. Let's only use AT_SSR
in background GC and not high urgent GC modes.

Signed-off-by: Weichao Guo <guoweichao@oppo.com>
Signed-off-by: Huang Jianan <huangjianan@oppo.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

parent 5ac443e2

fs/f2fs/gc.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -1120,7 +1120,8 @@ static int move_data_block(struct inode *inode, block_t bidx,
		block_t newaddr;
		int err = 0;
		bool lfs_mode = f2fs_lfs_mode(fio.sbi);
		int type = fio.sbi->am.atgc_enabled ?
		int type = fio.sbi->am.atgc_enabled && (gc_type == BG_GC) &&
		(fio.sbi->gc_mode != GC_URGENT_HIGH) ?
		CURSEG_ALL_DATA_ATGC : CURSEG_COLD_DATA;

		/* do not read out */

fs/f2fs/segment.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -3263,7 +3263,9 @@ static int __get_segment_type_6(struct f2fs_io_info *fio)
		struct inode *inode = fio->page->mapping->host;

		if (is_cold_data(fio->page)) {
		if (fio->sbi->am.atgc_enabled)
		if (fio->sbi->am.atgc_enabled &&
		(fio->io_type == FS_DATA_IO) &&
		(fio->sbi->gc_mode != GC_URGENT_HIGH))
		return CURSEG_ALL_DATA_ATGC;
		else
		return CURSEG_COLD_DATA;