Re: [ckrm-tech] RFC: Memory Controller

[Dave Hansen]

On Tue, 2006-10-31 at 11:48 +0300, Pavel Emelianov wrote:
> If memory is considered to be unreclaimable then actions should be
> taken at mmap() time, not later! Rejecting mmap() is the only way to
> limit user in unreclaimable memory consumption.

I don't think this is necessarily true.  Today, if a kernel exceeds its
allocation limits (runs out of memory) it gets killed.  Doing the
limiting at mmap() time instead of fault time will keep a sparse memory
applications from even being able to run.

Now, failing an mmap() is a wee bit more graceful than a SIGBUS, but it
certainly introduces its own set of problems.

-- Dave

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