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f2fs: skip new checkpoint when doing fstrim without fs change

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This patch enables to do fstrim without checkpoint, if there is no fs
change.

Signed-off-by: Yunlei He <heyunlei@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Yunlei He 2016-08-18 21:01:19 +08:00 committed by Jaegeuk Kim
parent f83a2584ca
commit 58cce381fa
1 changed files with 11 additions and 0 deletions
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11
fs/f2fs/checkpoint.c
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@ -1190,6 +1190,17 @@ 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));
flush_sit_entries(sbi, cpc);
clear_prefree_segments(sbi, cpc);
unblock_operations(sbi);
goto out;
}
/*
* update checkpoint pack index
* Increase the version number so that