On Mon, Nov 13, 2000 at 05:29:48PM +0530, aprasad@in.ibm.com wrote:
> When i run following code many times.
> System becomes useless till all of the instance of this programming are
> killed by vmm.
Good, so the OOM killer works.
> Till that time linux doesn't accept any command though it switches from one
> VT to another but its useless.
VT swithing is done by the kernel itself, not by a process.
> The above programme is run as normal user previleges.
> Theoretically load should increase but system should services other users
> too.
No. The system would *like* to service other processes, but it *can't*
because it is trashing.
> but this is not behaving in that way.
> ___________________________________________________________________
> main()
> {
> char *x[1000];
> int count=1000,i=0;
> for(i=0; i <count; i++)
> x[i] = (char*)malloc(1024*1024*10); /*10MB each time*/
>
> }
> _______________________________________________________________________
> If i run above programm for 10 times , then system is useless for around
> 5-7minutes on PIII/128MB.
Sounds quite normal to me. If you don't enforce process limits, you
allow a normal user to thrash the system.
Erik
-- J.A.K. (Erik) Mouw, Information and Communication Theory Group, Department of Electrical Engineering, Faculty of Information Technology and Systems, Delft University of Technology, PO BOX 5031, 2600 GA Delft, The Netherlands Phone: +31-15-2783635 Fax: +31-15-2781843 Email: J.A.K.Mouw@its.tudelft.nl WWW: http://www-ict.its.tudelft.nl/~erik/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Wed Nov 15 2000 - 21:00:23 EST