F2FS File-System Gets Discard Improvements, Nobarrier Fsync Mode For Linux 4.18

[phoronix]

Phoronix: F2FS File-System Gets Discard Improvements, Nobarrier Fsync Mode For Linux 4.18

Flash-Friendly File-System (F2FS) maintainer Jaegeuk Kim has submitted the file-system updates intended for the Linux 4.18 kernel...

http://www.phoronix.com/scan.php?page=news_item&px=F2FS-Updates-Linux-4.18

[shmerl]

So when is F2FS for Windows coming, or the idea of making universal filesystem for flash drives / SD cards was a fake?

Without ubiquitous support, sharing such drives / cards is a pain.

[tajjada]

Does F2FS still eat data?

Last time I tried it (about a year ago), I noticed I was getting a lot of corrupted files and data losses after a few unclean shutdowns, so I noped straight out of there.

A filesystem that cannot recover from an unclean shutdown is not for me.

[andreano]

The patch looks like this:

- if (!atomic)
+ if (!atomic && F2FS_OPTION(sbi).fsync_mode != FSYNC_MODE_NOBARRIER)
         ret = f2fs_issue_flush(sbi, inode->i_ino);

"nobarrier" (…) doesn't issue flush command for non-atomic files [like the] "nobarrier" mount option.

What is an atomic file?

[starshipeleven]

What is an atomic file?

I think it means "atomic write" or "atomic transaction". F2FS does have atomic write support afaik. https://www.spinics.net/lists/kernel/msg1834034.html

But using this is up to the application apparently as it is a specific system call. https://phoronix.com/scan.php?page=n...-3.21-Released