Moving of mmap'ed files from one guest into another guest

["Chigurupati, Chaks" <chaks@wichorus.com>]

Hi folks,

Any comments/insight on the following problem statement will be
appreciated.

Host and the guests are running the same linux distro and a recent kernel
(say 2.6.34 and later). The applications on guest 1 are creating several
mmap'ed files that dynamically grow and shrink. The application from guest
1 needs to be moved into guest 2. The application will be first
killed/stopped before it is launched in guest 2. However, it needs access
to the mmap'ed files that are in guest 1. I do not want to use an IPC
mechanism to replicate these files into guest 2. I am looking for a
mechanism that unmaps/unlinks these files from guest 1 and makes them
available to guest 2. The files can be in the order of gigabytes.

Is it possible to do the above thing in kvm using any available
technologies (say ivshmem)?

Thx
Chaks


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