From: Jan Vorbrueggen [jan@fsnif.neuroinformatik.ruhr-uni-bochum.de]
Sent: Friday, January 07, 2000 11:40 AM
To: Info-VAX@Mvb.Saic.Com
Subject: Re: Who has a global section mapped ? FAQ material

Andy <andy.williams@liffe.com> writes:

> We have a global section (not permanant) on VAX V6.2 and want to find
> out which processes have it mapped into their virtual address space.
> Is there a (supported) way to do this ?

This crops up fairly often...isn't it in the FAQ by now?

The answer is no. Each process mapping a global section (permanent or not,
that is irrelevant) has a process section that point to the global section,
but there is no pointer from the global section back to its mappers, save
in the form of a reference count (which, when it goes to 0, will enable
deletion of the section; permanent sections are established by initializing
this value to 1). Thus, you have to scan every process' process section
table (look for PST in SDA) for pointers to the entry in the GST (which
is swapper's PST, IIRC) which you are interested in. With a little help
from I&DS, that should be doable, but nobody has done it so far...

	Jan