You can do this via the mlockall(2) system call under Linux; this will work for the whole process, but do read about the argument you need to pass.
Do you really need to pull the whole thing in-core? If it’s a java app, you would presumably lock the whole JVM in-core. I don’t know of a command-line method for doing this, but you could write a trivial program to call fork
, call mlockall
, then exec
.
You might also look to see if one of the access pattern notifications in madvise(2) meets your needs. Advising the VM subsystem about a better paging strategy might work out better if it’s applicable for you.
Note that a long time ago now under SunOS, there was a mechanism similar to madvise called vadvise(2).