Hi Al, I just ran some tests involving many parallel mount and unmount operations. I sometimes get EINVAL and the umount program says "not mounted". Which is definitively wrong. It feels like a race condition somewhere in the VFS code. I use todays master branch (commit fc14f9c1272f62c3) on s390 with 1024 DASD devices. In fs/namespace.c, sys_umount: > retval = user_path_mountpoint_at(AT_FDCWD, name, > lookup_flags, &path); ... > retval = -EINVAL; > if (path.dentry != path.mnt->mnt_root) > goto dput_and_out; This seems to be erroneously true from time to time. The script does something equivalent to: > for n in $DEVNODES; do > umount $n & > done Do you have any idea what's wrong? Kind regards Philipp -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html