From: Andrew Morton <akpm@osdl.org>
To: Chuck Ebbert <76306.1226@compuserve.com>
Cc: linux-kernel@vger.kernel.org, torvalds@osdl.org
Subject: Re: [patch 2.6.13-rc6] docs: fix misinformation about overcommit_memory
Date: Fri, 19 Aug 2005 20:24:26 -0700 [thread overview]
Message-ID: <20050819202426.5208961e.akpm@osdl.org> (raw)
In-Reply-To: <200508192318_MC3-1-A7AE-1D7A@compuserve.com>
Chuck Ebbert <76306.1226@compuserve.com> wrote:
>
> +Controls overcommit of system memory:
It should explain what "overcommit" is.
> +
> +0 - Heuristic overcommit handling. Obvious overcommits of
> + address space are refused. Used for a typical system. It
> + ensures a seriously wild allocation fails while allowing
> + overcommit to reduce swap usage. root is allowed to
> + allocate slighly more memory in this mode. This is the
> + default.
> +
> +1 - Always overcommit. Appropriate for some scientific
> + applications.
> +
> +2 - Don't overcommit. The total address space commit
> + for the system is not permitted to exceed swap + a
> + configurable percentage (default is 50) of physical RAM.
Configurable how?
> + Depending on the percentage you use, in most situations
> + this means a process will not be killed while accessing
> + pages but will receive errors on memory allocation as
> + appropriate.
next prev parent reply other threads:[~2005-08-20 3:25 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-08-20 3:14 Chuck Ebbert
2005-08-20 3:24 ` Andrew Morton [this message]
2005-08-20 10:56 ` Adrian Bunk
2005-08-20 7:07 Chuck Ebbert
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