Subject: Re: address space reservation functionality?
From: Arjan van de Ven <arjan@infradead.org>
To: "Robert W. Fuller" <orangemagicbus@sbcglobal.net>
Cc: linux-kernel@vger.kernel.org
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Date: Tue, 11 Jan 2005 20:19:46 +0100
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> > 
> 
> Sorry about the top posting.  This is a resend without it.
> 
> This is not quite the same thing.  This still does a check for whether 
> or not there is enough memory 

no it doesn't


> and includes this in the virtual size of 
> the process.  

because the virtual size is taken.... by the reservation

> I simply want to reserve a part of the address space so 
> I'm guaranteed I can map something else over a contiguous portion of the 
> address space.  I don't want it to check for available memory or 
> increase the virtual size of the process because I will be using this 
> region sparsely.  That is why Solaris and Windows have separate 
> interfaces for this.

well you can mmap /dev/zero.. but that's about the same as malloc.


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