On Tue, May 31, 2022 at 4:32 PM Thomas Munro <thomas.munro@gmail.com> wrote:
> This FPM isn't in a DSM. (It happens to have DSMs *inside it*,
> because I'm using it as a separate DSM allocator: instead of making
> them with dsm_impl.c mechanisms, this one recycles space from the main
> shmem area). I view FPM as a reusable 4kb page-based memory allocator
> that could have many potential uses, not as a thing that must live
> inside another thing with a TOC. The fact that it uses the relptr
> thing makes it possible to use FPM inside DSMs too, but that doesn't
> mean it has to be used inside a DSM.
Could it use something other than its own address as the base address?
One way to do this would be to put it at the *end* of the
"Preallocated DSM" space, rather than the beginning.
--
Robert Haas
EDB: http://www.enterprisedb.com
