I'm using YAFFS with the 2.4.26-ts9 kernel on a Technologics TS-7250.
When I set the SGID bit on a directory, files created under it do not inherit the group ID, and directories created under it inherit neither the group ID nor the SGID bit.
I have a ramfs mount active at the same time (on /tmp), and the correct SGID behavior occurs there, so it's got to be a filesystem-specific issue.
Is there some mount option I should be using? I tried the 'grpid' mount option, but it had no effect on the problem.
Any ideas anyone?