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Commit 711f0385 authored by Jaegeuk Kim's avatar Jaegeuk Kim
Browse files

f2fs: avoid needless checkpoint in f2fs_trim_fs 



The f2fs_trim_fs() doesn't need to do checkpoint if there are newly allocated
data blocks only which didn't change the critical checkpoint data such as nat
and sit entries.

Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 5521ead7

fs/f2fs/checkpoint.c

+9 −8
Original line number Diff line number Diff line
@@ -1249,15 +1249,16 @@ int write_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc) 
	f2fs_flush_merged_bios(sbi);



	/* this is the case of multiple fstrims without any changes */

	if (cpc->reason == CP_DISCARD && !is_sbi_flag_set(sbi, SBI_IS_DIRTY)) {

		f2fs_bug_on(sbi, NM_I(sbi)->dirty_nat_cnt);

		f2fs_bug_on(sbi, SIT_I(sbi)->dirty_sentries);

		f2fs_bug_on(sbi, prefree_segments(sbi));

	if (cpc->reason == CP_DISCARD) {

		if (NM_I(sbi)->dirty_nat_cnt == 0 &&

				SIT_I(sbi)->dirty_sentries == 0 &&

				prefree_segments(sbi) == 0) {

			flush_sit_entries(sbi, cpc);

			clear_prefree_segments(sbi, cpc);

			unblock_operations(sbi);

			goto out;

		}

	}



	/*

	 * update checkpoint pack index