f2fs, sync, mopunt -o sync, power loss

f2fs, sync, mopunt -o sync, power loss

[Paolo Minazzi]

I'm Paolo.
I'm integrating f2fs on an ARM board.
I do not have the power-off button.
The normal way to power-off is to cut-off the power.

I tried to mount in sync mode
     mount -t f2fs -o sync /dev/mmcblk0 /data
     echo Hello > /data/Hello.txt
I realize that if I cut-off the power after "echo" finishes, at the new 
boot I see that f2fs execute the recovery.

If I add the "sync" command
     mount -t f2fs -o sync /dev/mmcblk0 /data
     echo Hello > /data/Hello.txt
     sync
I realize that if I cut-off the power after "sync" finishes, at the new 
boot I do not see the f2fs
recovery and the boot process is faster.

This means that -o sync is different that execute a sync command after 
each write.

Is there a solution to force sync automatically after each write ?

I would like avoid the following ...
while true
do
     sync
     sleep 1
done

Thanks for your time and for this great project
Paolo Minazzi


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