Bug 195657 - i386: Switch Memory Layout from DISCONTIG to SPARSEMEM
Summary: i386: Switch Memory Layout from DISCONTIG to SPARSEMEM
Keywords:
Status: CLOSED WONTFIX
Alias: None
Product: Fedora
Classification: Fedora
Component: kernel
Version: rawhide
Hardware: i386
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Kernel Maintainer List
QA Contact: Brian Brock
URL:
Whiteboard:
Depends On: 195391
Blocks:
TreeView+ depends on / blocked
 
Reported: 2006-06-16 13:18 UTC by Prarit Bhargava
Modified: 2007-11-30 22:11 UTC (History)
3 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2006-07-11 13:54:08 UTC
Type: ---
Embargoed:


Attachments (Terms of Use)

Description Prarit Bhargava 2006-06-16 13:18:58 UTC
+++ 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 prarit on 2006-06-14 19:01 EST --
Created an attachment (id=130943)
Patch to switch to SPARSEMEM

Comment 1 Dave Jones 2006-07-11 05:36:16 UTC
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.

http://www.x86-64.org/lists/discuss/msg09335.html

Comment 2 Prarit Bhargava 2006-07-11 13:54:08 UTC
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.

P.


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