Subject: mmap and anonymous memory.
To: None <email@example.com>
From: Jeff Roberson <firstname.lastname@example.org>
Date: 12/08/1999 22:14:56
If I mmap an area of anonymous memory and set the protection bits to
write only will it be associated with any physical memory? I assume it
isn't filled until there is a page fault, which shouldn't fill it anyway
because it's write only. Are these assumptions correct? I'd like to put
a cap on a second stack so that it doesn't overflow onto other memory on
the heap, but I don't want the cap to waste memory.
This leads me to a second question.. Where are the stacks allocated for
the upcalls in the scheduler activations? Are these stacks growable? And
if not, are they capped?
I apologise if this isn't the appropriate place to ask, but I don't know
anyone else who might know the answer.