Messages in this thread | | | From | "David Schwartz" <> | Subject | RE: Recursive malloc crashing Linux. (Well almost) | Date | Fri, 17 Dec 1999 21:51:48 -0800 |
| |
> My program (killmem.c, attached) doesn't recurse. > > It allocates (in a loop) lots of memory in 4MB chunk mmaps. (1GB total) > It then fills each chunk one at a time until it dies. > This demonstrates the ability to allocate far more memory than is > available, and subsequently die when accessing it. This is overcommit, > even when overcommit is turned off. > > Allocating memory in a single 1GB chunk fails gracefully, but allocating > in 4MB chunks works until you access it.
*Yawn* You've written a program that manages to kill itself by shooting itself in the foot. I can to that too:
char *j=NULL; *j++;
Yes, Linux will overcommit even when overcommitting is turned off. There really is no good way to solve this problem.
DS
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/
| |