How many page flags do we really have?
Posted Jun 7, 2009 9:33 UTC (Sun) by farnz
In reply to: How many page flags do we really have?
Parent article: How many page flags do we really have?
One difference is the size of lowmem. On a 32-bit system, those 4 bytes
per page all come out of the first 896MB of physical RAM. On a 64-bit
system, they come out of your total RAM. It's a lot easier to
accept waste when it's not in such a tightly restricted block of memory;
we already have problems with running low on lowmem on 32-bit systems with
more than around 8GB RAM, which are best solved by going to 64-bit.
to post comments)