>> When a process malloc's memory, you return a null pointer, and the
> program should quit (if it's well written) or soon core dump, if it's
> not. The kernel should reserve the last meg or two for itself, so it could
> keep running until enough processes are given the chop.
>Ah this is what Linux does, unfortuantely Linux also does something call
memory overcommital (or something similiarly named), if I do
malloc(3000000) or whatever, the kernel doesn't give me that much memory
until I start to use it later on by dirtying the pages.... so there is no
where for the app to realise oh crap malloc failed as malloc didn't fail,
the kernel just didn't have anything left to fill out the memory it
promised the application earlier on ....
I have no links, but there is some reason on the net why this is a good
David Airlie, Software Engineer
Drua Technologies Ltd, Innovation Centre, National Tech Park, Limerick.
t: +353-61-503075 / f: +353-61-338065 / David.Airlie at drua.ie
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