Messages in this thread |  | | Date | Mon, 25 Sep 2000 17:01:13 +0200 | From | Andrea Arcangeli <> | Subject | Re: the new VM |
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On Mon, Sep 25, 2000 at 04:43:44PM +0200, Ingo Molnar wrote: > i talked about GFP_KERNEL, not GFP_USER. Even in the case of GFP_USER i
My bad, you're right I was talking about GFP_USER indeed.
But even GFP_KERNEL allocations like the init of a module or any other thing that is static sized during production just checking the retval looks be ok.
> believe the right place to oom is via a signal, not in the gfp() case.
Signal can be trapped and ignored by malicious task. We had that security problem until 2.2.14 IIRC.
> (because oom situation in the gfp() case is a completely random and > statistical event, which might have no connection at all to the behavior > of that given process.)
I agree we should have more information about the behaviour of the system and I think a per-task page fault rate should work in practice.
But my question isn't what you do when you're OOM, but is _how_ do you notice that you're OOM?
In the GFP_USER case simply checking when GFP fails looks right to me.
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