mingming cao wrote:

>Here is what I saw:
>
>[root@elm3b83 shmctl]# ./shmctl01
>shmctl01    1  PASS  :  pid, size, # of attaches and mode are correct -
>pass #1
>shmctl01    0  INFO  :  shmdt() failed - 22
>shmctl01    0  INFO  :  shmdt() failed - 22
>shmctl01    0  INFO  :  shmdt() failed - 22
>shmctl01    0  INFO  :  shmdt() failed - 22
>
These failures are caused by a bug in the ltp test. See the attached patch.

>shmctl01    2  PASS  :  pid, size, # of attaches and mode are correct -
>pass #2
>shmctl01    0  INFO  :  shmdt() failed - 22
>shmctl01    0  INFO  :  shmdt() failed - 22
>shmctl01    0  INFO  :  shmdt() failed - 22
>shmctl01    0  INFO  :  shmdt() failed - 22
>shmctl01    3  FAIL  :  # of attaches is incorrect - 0
>
This one is odd. The testcase contains races, but they can only increase 
# of attaches.
Could you strace shmctl01?
The testcase with shmat(), then fork() fails.

--
    Manfred