Hi David, On Fri, Nov 29, 2019 at 03:22:15PM -0500, David Michael wrote: > Hi, > > I tried to test EROFS on Linux 5.4 as the root file system and mounted > a writable overlay (with upper layer on tmpfs) over /etc, but I get > ENODATA errors when attempting to modify files. For example, adding a > user results in "Failed to take /etc/passwd lock: No data available". > Files can be modified after unlinking and restoring them so they're > created on the upper layer. This is not necessary with other > read-only file systems (at least squashfs or ext4 with the read-only > feature). I tried while forcing compact and extended inodes. > > Is EROFS intended to be usable as a lower layer with overlayfs?
Yes, and overlayfs were used on our smartphones for development use only as well. I think it's weird, I will try it on the latest kernel now, and see if I can reproduce this issue soon... Thanks for your report! Thanks, Gao Xiang > > Thanks. > > David
