Re: problem with MAP_SHARED|MAP_ANONYMOUS mapping in openMosix-2.4.26-1

Ratna

Just tried to recreate the problem and I can't. It's not migrating the
process when I use mmap shared.

Moshe

On 9/25/05, Ratna Manoj Bolla <[email protected]> wrote:
>
>
>
> //-----------------------------------------------------------------------------
> #include<stdio.h>
> #include<sys/mman.h>
> #include <sys/types.h>
> #include <sys/stat.h>
> #include <fcntl.h>
> main() {
> int *a =
> mmap(0,4096,PROT_READ|PROT_WRITE,MAP_SHARED|MAP_ANONYMOUS,0,0);
> *a = 0;
> if(fork())
> while(1) { sleep(2); ++(*a); }
> else
> while(1) { printf("%d\n",*a); sleep(2); }
> }
>
>
> //------------------------------------------------------------------------------
>
> The output of this program should be
> 0
> 1
> 2
> 3
> .
> .
>
> but output would remain constant after migrating one of the processes.
>
> openMosix shold not allow migrating processes sharing
> MAP_SHARED|MAP_ANONYMOUS pages.
>
> from,
> Ratna Manoj Bolla,
> M.Tech IInd year,
> dept. of CSE,
> Indian Institute of Technology,
> Guwahati,
> India.
>
>
>
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