Messages in this thread | | | From | (Alan Cox) | Subject | Re: vfork: out of memory, when there's plenty of swap free | Date | Sun, 14 Mar 1999 17:17:05 +0000 (GMT) |
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> Relying on 2 PAGES allocations _is_ broken. You can invent any prothesis > you want, a single butterfly that does not behave as you believe all > bufferflies should behave can defeat it, in my opinion that is not going > to change on this topic.
You can reduce it to such a low probability of failure thats the situation for failure of 2 page pairs is extremely unlikely to occur. Even a very gently applied VM goal will ensure they almost aways do
> Btw, I donnot want to rely on 2 PAGES allocations having to succeed most > of the time.
No argument. However because a lot drivers rely on the stack being DMAable on X86 2.2 wasnt able to switch to a virtualised stack
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