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SubjectRe: Expand VM
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 can 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 Linux
> 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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