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Subject2.4 kernel series and the oom_killer and /proc/sys/vm/overcommit_memory
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

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