On Wed, Jun 10, 2020 at 06:36:16PM -0700, Matthew Wilcox wrote: > while (file->f_mode & FMODE_OVL_UPPER) > file = file->private_data; > return file; > > Or are you proposing that overlayfs copy FMODE_HUGEPAGES from the > underlying fs to the overlaying fs? The latter - that way nobody outside of overlayfs needs to know what its ->private_data points to, for one thing. And it's cheaper that way, obviously.
