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f2fs: introduce CP_TRIMMED_FLAG to avoid unneeded discard

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Introduce CP_TRIMMED_FLAG to indicate all invalid block were trimmed
before umount, so once we do mount with image which contain the flag,
we don't record invalid blocks as undiscard one, when fstrim is being
triggered, we can avoid issuing redundant discard commands.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu
2017-04-28 13:56:08 +08:00
committed by Jaegeuk Kim
parent c473f1a965
commit 1f43e2ad7b
6 changed files with 35 additions and 9 deletions
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include/linux/f2fs_fs.h
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@@ -114,6 +114,7 @@ struct f2fs_super_block {
/*
* For checkpoint
*/
#define CP_TRIMMED_FLAG 0x00000100
#define CP_NAT_BITS_FLAG 0x00000080
#define CP_CRC_RECOVERY_FLAG 0x00000040
#define CP_FASTBOOT_FLAG 0x00000020