Messages in this thread | | | Date | Mon, 13 Nov 2000 14:06:41 +0100 | From | Erik Mouw <> | Subject | Re: reliability of linux-vm subsystem |
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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/
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