/proc/sys/vm/mmap_min_addr missing

[Valery Reznic]

Recently I stumbled upon some mystery that I can't understand.
My Google search bring no results.

I have 3 VM with different Linuxes that run under QEMU and now I noticed that
all of them don't have /proc/sys/vm/mmap_min_addr files (/proc is mounted)

I am sure that this file was here some time ago.
I didn't recompile kernel in any of those VMs, don't upgrade QEMU - nothing of the sort.

But those VMs where started and stopped multiple times.

So my questions:
1. What happened, where this file gone?
2. How can I get it back?

My host system (Fedora 12, x86-64) has this file.


Thank you,
Valery.
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