No RAM swapout to disk for "sandbox" run programs

[james@spunkysoftware.com]

PGP uses, or did use, a (sloppy?) memory driver which prevented process
address space active in RAM from being swapped out to disk.

I have written Linus Torvalds talking about a range of PIDs, or a new field
in the task_struct, which would indicate to the mm in the kernel that
swapping this process' address space out to disk was forbidden.

A program can be launched from a shell that acts as a "sandbox" to run
programs that shouldn't be swapped to disk. All tasks forked from this
should be regarded as unswappable. This would be useful for encryption
programs, since PGP on WinNT at least was already doing it. I'm not sure how
GnuPG handles this at the moment.

Any thoughts anyone?

Also, I am wondering where I can get software that will allow me to look at
arbitrary memory ranges, the purpose being to look at "deleted" files on
Windows and Linux. Anybody know of any such software? Is there a kernel
module that allows this?

James Buchanan



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