no-administration heap?

Colin Walters walters at
Thu Feb 28 21:58:58 UTC 2008

On Thu, Feb 28, 2008 at 4:20 PM, Florian Weimer <fw at> wrote:
>  At least on Linux, the problem is that there is no documented API to
>  reserve address space (so that no other mappings end up there) without
>  actually allocating backing store.  MAP_NORESERVE does not work as
>  documented.

Ah, I see.  So this problem is essentially blocked on the lack of a
sufficient/documented Linux kernel interface?
Do other operating systems (Windows, Solaris) provide a good enough
interface for OpenJDK?

I'm assuming changing the collector to not require a continuous
address space would be too invasive?

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