On Wed, Jun 24, 2015 at 07:17:50PM -0400, Theodore Ts'o wrote: > On Wed, Jun 24, 2015 at 08:02:15PM +0200, David Sterba wrote: > > > > This sounds similar to what Dave proposed, a per-inode I_VERSION > > attribute that can be changed through chattr. Though the negated meaning > > of the flag could be confusing, I had to reread the paragraph again. > > Dave did not specify an I_VERSION attribute that would be stored on > disk. Instead he talked about a inode flag that would be set when the > struct inode is created by the file system.
Right. > This would allow file systems to permanently configure (on a per-inode > basis) whether or not a particular inode would require a forced > i_version update any time the inode's data or metadata is modified. I > suppose you could initialized the inode flag from an on-disk > attribute, but that wasn't implied by Dave's proposal, at least as I > understood it. It enables filesystems to do this. If btrfs want to add an on-disk flag to turn off I_VERSION on a per-inode basis, or imply it from some other on-disk flag, then they are welcome to do so and the above infrastructure change will support it. Cheers, Dave. -- Dave Chinner [email protected] -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
