/proc/slabinfo update issue

[Manoj Kumar Santubhai Jain <ManojKumarS_Jain@xxxxxxxxxxx>]

Hi,

When the file /proc/slabinfo does get updated?

I started new process and I was thinking mm_struct active objects should be increased but it stays constant.

Program:
Hello.c
int main(){
        printf("Welcome to SI-LUNX\n");
        sleep(100);
        return 0;
}

Output Before staring process:
#cat /proc/slabinfo | grep mm_struct
mm_struct             52     64    512    8    1 : tunables    0    0    0 : slabdata      8      8      0
# ps -fu root | wc
     70     615    4645

Started process in another shell (shell was already open)  /home/manoj/hello

Output after Starting process
# cat /proc/slabinfo | grep mm_struct
mm_struct             52     64    512    8    1 : tunables    0    0    0 : slabdata      8      8      0
# ps -fu root | wc
     71     623    4711

Is it possible that parent(shell) and child (hello) using same mm_struct ?
I also tried running /home/manoj/hello&, but the result is same.

Is there something that I need to enable in my config file? Or there is a possible bug with update on /proc/slabinfo?

Note: /sys/kernel/slab/mm_struct/objects also shows same result.

Other Information:
#uname -r
2.6.25
# cat /home/manoj/build/kernel/.config | grep SLUB
CONFIG_SLUB_DEBUG=y
CONFIG_SLUB=y
CONFIG_SLUB_DEBUG_ON=y
CONFIG_SLUB_STATS=y
# cat /home/manoj/build/kernel/.config | grep SLAB
# CONFIG_SLAB is not set
CONFIG_SLABINFO=y

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