On Sat, Jul 22, 2017 at 03:38:41PM +0200, Damien Guibouret wrote: > > If you look at vfs layer, vfs_mkdir does the check against max_links with >= > and so if you reach the value, you will never be able to create a new > directory even if nlink feature is present. Actually it is not a problem > because ext4 does not set the s_max_links value in vfs (do not know why as > ext2 set it perhaps because there is no limit if nlink is set?), but it > could be some latent bug if someday somebody thinks it could be a good idea > to set it. We can't set s_max_links precisely because of the dir_nlinks feature. So the fact that it is not set today is deliberate, and if someone thought it was good idea, I and the other ext4 developers would NAK it. - Ted
