Re: Playing with namespaces and bloat-o-meeter

[Pavel Emelyanov <xemul-GEFAQzZX7r8dnm+yROfE0A@public.gmane.org>]

Cedric Le Goater wrote:
> Cedric Le Goater wrote:
>> Serge E. Hallyn wrote:
>>> Quoting Pavel Emelyanov (xemul-GEFAQzZX7r8dnm+yROfE0A@public.gmane.org):
>>>> Hi, guys!
>>>>
>>>> I've noticed that compiling out all the core related to
>>>> cloning and cleaning the new namespace saves us more than
>>>> a Kbyte (!) from the vmlinux.
>>>>
>>>> add/remove: 19/0 grow/shrink: 6/6 up/down: 1532/-336 (1196)
>>>> function                                     old     new   delta
>>>> copy_user_ns                                   -     181    +181
>>>> copy_ipcs                                      -     149    +149
>>>> copy_utsname                                   -     120    +120
>>>> shm_exit_ns                                    -     106    +106
>>>> sem_exit_ns                                    -     106    +106
>>>> msg_exit_ns                                    -     106    +106
>>>> freeary                                        -     100    +100
>>>> release_uids                                   -      95     +95
>>>> freeque                                        -      92     +92
>>>> free_nsproxy                                  48      99     +51
>>>> __sem_init_ns                                  -      45     +45
>>>> shm_init_ns                                    -      42     +42
>>>> sem_init_ns                                    -      42     +42
>>>> msg_init_ns                                    -      42     +42
>>>> __shm_init_ns                                  -      38     +38
>>>> create_new_namespaces                        300     335     +35
>>>> __msg_init_ns                                  -      31     +31
>>>> sysvipc_proc_release                           5      35     +30
>>>> free_ipc_ns                                    -      30     +30
>>>> do_shm_rmid                                    -      29     +29
>>>> shm_release                                   18      39     +21
>>>> free_user_ns                                   -      16     +16
>>>> sysvipc_proc_open                            100     111     +11
>>>> do_shmat                                     778     787      +9
>>>> free_uts_ns                                    -       5      +5
>>>> sys_shmctl                                  1934    1907     -27
>>>> msg_init                                      82      47     -35
>>>> shm_init                                      92      47     -45
>>>> sem_init                                      99      44     -55
>>>> sys_msgctl                                  1394    1311     -83
>>>> sys_semctl                                  2123    2032     -91
>>>>
>>>> Since there already were some questions like "do I need it
>>>> on my cellphone?" in reply to pid namespaces patches and 
>>>> so on, why don't we make ALL the namespaces cloning code 
>>>> under the config option to make those people happy?
>>>>
>>>> Here's the proposed patch.
>>> How about a single config variable for all namespaces?
>> yes good idea.
> 
> 
> oops, that done already in the patch : CONFIG_NAMESPACES

So... Acked-by: Serge E. Hallyn and Cedric Le Goater ? :)

> thanks :)
> 
> C.
> 
>