Re: Memory overcommit

[KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>]

On Tue, 20 Oct 2009 23:52:33 +0200
Vedran FuraA? <vedran.furac@gmail.com> wrote:

> Hi and sorry for delay. Also, please CC me.

> > But I agree, OOM killer should be sophisticated.
> > Please give us a sample program/test case which causes problem.
> > linux-mm@kvack.org may be a better place. lkml has too much traffic.
> 
> #include <stdio.h>
> #include <string.h>
> #include <stdlib.h>
> #include <unistd.h>
> 
> int main()
> {
>   char *buf;
>   while(1) {
>     buf = malloc (1024*1024*100);
>     if ( buf == NULL ) {
>       perror("malloc");
>       getchar();
>       exit(EXIT_FAILURE);
>     }
>     sleep(1);
>     memset(buf, 1, 1024*1024*100);
>   }
>   return 0;
> }
> 
> 
> After running this on a typical desktop with gnome or kde, OOM killer
> will kill 5-10 innocent processes before killing this one. Tested
> multiple times on multiple installations.
> 
> Regards,
> 
Can I make more questions ?

 - What's cpu ?
 - How much memory ?
 - Do you have swap ?
 - What's the latest kernel version you tested?
 - Could you show me /var/log/dmesg and /var/log/messages at OOM ?
 
Thanks,
-Kame



> Vedran
> 
> 
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