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To: User & <breno_silva@beta.bandnet.com.br>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Expand VM 
In-Reply-To: Your message of "Thu, 23 Jan 2003 16:40:14 -0300."
             <20030123194014.M374@beta.bandnet.com.br> 
From: Valdis.Kletnieks@vt.edu
References: <20030123155627.M95099@beta.bandnet.com.br> <200301231655.h0NGtc75010414@turing-police.cc.vt.edu>
            <20030123194014.M374@beta.bandnet.com.br>
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On Thu, 23 Jan 2003 16:40:14 -0300, User & said:
> Create a new VMA on Linux B for Linux A is easy , but i have a problem =
, the =

> address of VMA is returned on Linux B , so the VMA created on Linux B c=
an not
 =

> be used for process of linux A.

It's unclear whether you're just trying to use B for added swap space, or=

if you want B to actually run code.

If it's the former, all you have to do is allocate a lot of disk space on=
 B,
and NFS export it to A, and then have A mount it (you might need to
use a loopback mount of a file on the NFS partition and then 'swapon' the=

loopback - I dont think swapon will directly take an NFS file)

> The problem is "how can i return address of VMA created on LINUX B to L=
inux =

> A , and use this space ?".

If you're trying to get B to actually run code, it gets a lot more messy,=
 as
you have to worry about open file descriptors, race conditions, and many
other things.
-- =

				Valdis Kletnieks
				Computer Systems Senior Engineer
				Virginia Tech


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