2.4 kernel series and the oom_killer and /proc/sys/vm/overcommit_memory

From: Marc-Christian Petersen (m.c.p@gmx.net)
Date: Thu Aug 22 2002 - 10:19:50 EST

Hi there,

I just have one question.

If I understand it correct, /proc/sys/vm/overcommit_memory controls if there
is "1" always enough memory and if "0" every program call checks if there is
enough memory.

I just tried to open up much Xterms until my RAM + SWAP is full. The system is
up and response is slowly for ~ 5 minutes, doing whatever, swapping or kinda
that. This was tested with overcommit_memory == 0 ... With 2.4.19, the
oom_killer comes NOT in action, after the 5 minutes the system is dead. With
2.4.18's oom_killer there are program kills at random.

My question now: Why isn't it possible, if overcommit_memory is 0, to really
check if there is enough memory or not, and if NOT just to display a message
like "Not enough memory for execution. Aborted" ?


Kind regards
        Marc-Christian Petersen


PGP/GnuPG Key: 1024D/569DE2E3DB441A16 Fingerprint: 3469 0CF8 CA7E 0042 7824 080A 569D E2E3 DB44 1A16 Key available at www.keyserver.net. Encrypted e-mail preferred. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/

This archive was generated by hypermail 2b29 : Fri Aug 23 2002 - 22:00:25 EST