XFS - can you pass "nobarriers" mount option to live filesystem?
 

I have a live system running mysql under an XFS mount that was having performance issues. I was told to remount the filesystem with mount -o remount,noatime /dir*

That went well but after looking at mount -l I noticed that the directory now has nobarrirers enabled also... Not sure why???

Fstab does have this option for the other XFS filesystems and this filesystem was added but I never used mount -a

Any ideas if this is ok?