William Lee Irwin III wrote:

>It's capable(CAP_IPC_LOCK) || in_group_p(0), not current->uid == 0.
>It will barf if you ask for more than either one of those limits. It
>will also barf if you ask for an amount not a multiple of the hugepage
>size. Please show the test program's code and strace the test program
>to determine what response it's getting.
>
>  
>
I attached the test pgm. It is nearly the same as shown
in Documentation/vm/hugetlbpage.txt

If you run it as root, it allocates 1 Hugepage, if run as user, it fails.

roesrv01:~ # ./a.out
shmid: 0x220004
shmaddr: 0x40167000
Starting the writes:
....
Starting the Check...Done.
roesrv01:~ # su - jochen
jochen@roesrv01:~> ./a.out
Failure:: Operation not permitted

I guess, a strace is not necessary.
The pgm has only the main function and only one position where it says 
"Failure"

What do I have to do to make this pgm run as an ordinary user with a 
stock kernel?

Curious...
Jochen