Red Hat Bugzilla – Bug 195657
i386: Switch Memory Layout from DISCONTIG to SPARSEMEM
Last modified: 2007-11-30 17:11:35 EST
+++ This bug was initially created as a clone of Bug #195391 +++
Description of problem:
It's time that we make the switch. According to upstream reports SPARSEMEM will
eventually replace DISCONTIG. However, testing of platforms has become a
blocker for this... let's switch Fedora over and see what happens.
I've tested on various x86_64 platforms (a couple of Dells, a few HPs, an IBM
box) and haven't seen any issues.
-- Additional comment from firstname.lastname@example.org on 2006-06-14 19:01 EST --
Created an attachment (id=130943)
Patch to switch to SPARSEMEM
x86-64 is now done (for the last week or so), nothing bad seems to have happened
so far. i386 lacks this (or discontigmem) due to the absense of CONFIG_NUMA.
I'm not convinced that setting NUMA on i386 is a good idea.
In fact, from what I understand so far, it strikes me as a bad idea.
I think we can drop this. The underlying issue behind switching to SPARSE is
memory hotplug which appears to only effect ia64, x86_64, and ppc/64.