2.5.54-mjb3 (scalability / NUMA patchset)

[Martin J. Bligh]

Yeah, I know I'm "fashionably late", but I wanted to clear down some
stuff before porting to 2.5.55. Will do that tommorow.

The patchset contains mainly scalability and NUMA stuff, and anything 
else that stops things from irritating me. It's meant to be pretty stable, 
not so much a testing ground for new stuff.

I'd be very interested in feedback from anyone willing to test on any platform, however large or small.

http://www.aracnet.com/~fletch/linux/2.5.54/patch-2.5.54-mjb3.bz2

Since 2.5.54-mjb2 (tweaked NUMA-Q patches, added Summit support)

~ cleanup_cpu_apicid				Martin J. Bligh
~ smpboot_cam					Martin J. Bligh
+ summit1					James Cleverdon / John Stultz
+ summit2					James Cleverdon / John Stultz
+ summit3					James Cleverdon / John Stultz
+ summit4					James Cleverdon / John Stultz

Also reordered a bunch of stuff.

Pending:
Speed up page init on boot (Bill Irwin)
Notsc automatic enablement
scheduler callers profiling (Anton)
PPC64 NUMA patches (Anton)
Scheduler tunables (rml)
Lockless xtime structures (Andi)

kallsyms					Andi Kleen / Daniel Ritz
	Fix stem compression bug.

apicid_to_node					Martin Bligh
	Create an machine specific apicid_to_node for everyone

i386_topo					Matt Dobson
	Some i386 topology cleanups to make it cache the data.

do_boot_error					James Cleverdon
	Change do_boot_cpu to return an error code instead of fishing globally

more_numaq1					James Cleverdon / Martin Bligh
	yet more Numa-Q subarch splitup

cleanup_cpu_apicid				Martin J. Bligh
	Cleanup & simplify the apicid <-> cpu mapping stuff I put in ages ago.

smpboot_cam					Martin J. Bligh
	Remove clustered_apic_mode stuff from smpboot.c

nuke_clustered_apic				Martin J. Bligh
	Kill clustered_apic_mode and CONFIG_CLUSTERED_APIC forever.

fix_starfire_warning				Martin Bligh
	Fix trivial starfire compile warning that keeps annoying me.

shpte						Dave McCracken
	Shared pagetables (as a config option)

dcache_rcu					Dipankar / Maneesh
	Use RCU type locking for the dentry cache.
 
early_printk					Dave Hansen et al.
	Allow printk before console_init

confighz					Andrew Morton / Dave Hansen
	Make HZ a config option of 100 Hz or 1000 Hz

config_page_offset				Dave Hansen / Andrea
	Make PAGE_OFFSET a config option

vmalloc_stats					Dave Hansen
	Expose useful vmalloc statistics

numasched1					Erich Focht
	Numa scheduler general foundation work + pooling

numasched2					Michael Hohnbaum
	Numa scheduler lightweight initial load balancing.

local_pgdat					Bill Irwin
	Move the pgdat structure into the remapped space with lmem_map

thread_info_cleanup (4K stacks pt 1)		Dave Hansen / Ben LaHaise
	Prep work to reduce kernel stacks to 4K
	
interrupt_stacks    (4K stacks pt 2)		Dave Hansen / Ben LaHaise
	Create a per-cpu interrupt stack.

stack_usage_check   (4K stacks pt 3)		Dave Hansen / Ben LaHaise
	Check for kernel stack overflows.

4k_stack            (4K stacks pt 4)		Dave Hansen
	Config option to reduce kernel stacks to 4K

notsc						Martin Bligh
	Enable notsc option for NUMA-Q (new version for new config system)

numameminfo					Martin Bligh / Keith Mannthey
	Expose NUMA meminfo information under /proc/meminfo.numa

kgdb						Andrew Morton / Various People
	The older version of kgdb, synched with 2.5.54-mm1

noframeptr					Martin Bligh
	Disable -fomit_frame_pointer

-mjb						Martin Bligh
	Add a tag to the makefile