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Re: Running out of memory in 1 easy step

To: Wichert Akkerman <wichert@cistron.nl>
Subject: Re: Running out of memory in 1 easy step
From: Mark Hahn <hahn@coffee.psychology.mcmaster.ca>
Date: Thu, 14 Sep 2000 19:03:06 -0400 (EDT)
cc: linux-mm@kvack.org
In-Reply-To: <20000914212004.A1304@cistron.nl>
Sender: owner-linux-mm@kvack.org

> Not likely, there were still a couple hundreds of megabytes free and
> the process had allocated about 1.5Gb of data.

mmaping 1 to 4096 bytes consumes 8K from your address space:
one for the mmaped page, and one (virtual) guard page (unless 
you use MAP_FIXED, of course.)  4G / 8K is approximately the 458878
you reported.  actually, since maps begin at 1G, I would have
expected you to run out sooner...

regards, mark hahn.

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References:
- Re: Running out of memory in 1 easy step
  - From: Wichert Akkerman <wichert@cistron.nl>

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