linux/mm
Mel Gorman b377fd3982 Apply memory policies to top two highest zones when highest zone is ZONE_MOVABLE
The NUMA layer only supports NUMA policies for the highest zone.  When
ZONE_MOVABLE is configured with kernelcore=, the the highest zone becomes
ZONE_MOVABLE.  The result is that policies are only applied to allocations
like anonymous pages and page cache allocated from ZONE_MOVABLE when the
zone is used.

This patch applies policies to the two highest zones when the highest zone
is ZONE_MOVABLE.  As ZONE_MOVABLE consists of pages from the highest "real"
zone, it's always functionally equivalent.

The patch has been tested on a variety of machines both NUMA and non-NUMA
covering x86, x86_64 and ppc64.  No abnormal results were seen in
kernbench, tbench, dbench or hackbench.  It passes regression tests from
the numactl package with and without kernelcore= once numactl tests are
patched to wait for vmstat counters to update.

akpm: this is the nasty hack to fix NUMA mempolicies in the presence of
ZONE_MOVABLE and kernelcore= in 2.6.23.  Christoph says "For .24 either merge
the mobility or get the other solution that Mel is working on.  That solution
would only use a single zonelist per node and filter on the fly.  That may
help performance and also help to make memory policies work better."

Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Acked-by:  Lee Schermerhorn <lee.schermerhorn@hp.com>
Tested-by:  Lee Schermerhorn <lee.schermerhorn@hp.com>
Acked-by: Christoph Lameter <clameter@sgi.com>
Cc: Andi Kleen <ak@suse.de>
Cc: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-08-22 19:52:47 -07:00
..
Kconfig Replace CONFIG_SOFTWARE_SUSPEND with CONFIG_HIBERNATION 2007-07-29 16:45:38 -07:00
Makefile CONFIG_BOUNCE to avoid useless inclusion of bounce buffer logic 2007-07-17 10:23:02 -07:00
allocpercpu.c Slab allocators: Replace explicit zeroing with __GFP_ZERO 2007-07-17 10:23:02 -07:00
backing-dev.c remove mm/backing-dev.c:congestion_wait_interruptible() 2007-07-16 09:05:52 -07:00
bootmem.c [PATCH] remove EXPORT_UNUSED_SYMBOL'ed symbols 2006-12-07 08:39:44 -08:00
bounce.c [BLOCK] Get rid of request_queue_t typedef 2007-07-24 09:28:11 +02:00
fadvise.c [PATCH] mm: change uses of f_{dentry,vfsmnt} to use f_path 2006-12-08 08:28:43 -08:00
filemap.c Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block 2007-08-11 16:01:06 -07:00
filemap.h Remove all inclusions of <linux/config.h> 2006-10-04 03:38:54 -04:00
filemap_xip.c mm: fault feedback #2 2007-07-19 10:04:41 -07:00
fremap.c only allow nonlinear vmas for ram backed filesystems 2007-07-19 10:04:41 -07:00
highmem.c Create the ZONE_MOVABLE zone 2007-07-17 10:22:59 -07:00
hugetlb.c Fix VM_FAULT flags conversion for hugetlb 2007-08-22 19:52:46 -07:00
internal.h Make page->private usable in compound pages 2007-05-07 12:12:53 -07:00
madvise.c speed up madvise_need_mmap_write() usage 2007-07-16 09:05:36 -07:00
memory.c remove handle_mm_fault export 2007-07-21 17:49:16 -07:00
memory_hotplug.c memory hotplug: fix unnecessary calling of init_currenty_empty_zone() 2007-06-01 08:18:29 -07:00
mempolicy.c Apply memory policies to top two highest zones when highest zone is ZONE_MOVABLE 2007-08-22 19:52:47 -07:00
mempool.c Slab allocators: Replace explicit zeroing with __GFP_ZERO 2007-07-17 10:23:02 -07:00
migrate.c memory unplug: isolate_lru_page fix 2007-07-26 11:35:17 -07:00
mincore.c [PATCH] mincore: vma crossing fix 2007-02-15 09:57:03 -08:00
mlock.c do not limit locked memory when RLIMIT_MEMLOCK is RLIM_INFINITY 2007-07-16 09:05:37 -07:00
mmap.c fix NULL pointer dereference in __vm_enough_memory() 2007-08-22 19:52:45 -07:00
mmzone.c [PATCH] remove EXPORT_UNUSED_SYMBOL'ed symbols 2006-12-07 08:39:44 -08:00
mprotect.c mm: variable length argument support 2007-07-19 10:04:45 -07:00
mremap.c mm: variable length argument support 2007-07-19 10:04:45 -07:00
msync.c Detach sched.h from mm.h 2007-05-21 09:18:19 -07:00
nommu.c fix NULL pointer dereference in __vm_enough_memory() 2007-08-22 19:52:45 -07:00
oom_kill.c oom: print points as unsigned long 2007-07-31 15:39:36 -07:00
page-writeback.c move page writeback acounting out of macros 2007-07-19 10:04:52 -07:00
page_alloc.c Apply memory policies to top two highest zones when highest zone is ZONE_MOVABLE 2007-08-22 19:52:47 -07:00
page_io.c [PATCH] swsusp: use block device offsets to identify swap locations 2006-12-07 08:39:27 -08:00
pdflush.c Freezer: make kernel threads nonfreezable by default 2007-07-17 10:23:02 -07:00
prio_tree.c
quicklist.c Quicklists for page table pages 2007-05-07 12:12:54 -07:00
readahead.c readahead: sanify file_ra_state names 2007-07-19 10:04:44 -07:00
rmap.c mm: Remove slab destructors from kmem_cache_create(). 2007-07-20 10:11:58 +09:00
shmem.c mm: Remove slab destructors from kmem_cache_create(). 2007-07-20 10:11:58 +09:00
shmem_acl.c [PATCH] Fix typos in mm/shmem_acl.c 2006-10-11 11:14:23 -07:00
slab.c slab: skip calling cache_free_alien() when the platform is not numa capable 2007-08-22 19:52:46 -07:00
slob.c slob: reduce list scanning 2007-07-21 17:49:16 -07:00
slub.c SLUB: do not fail on broken memory configurations 2007-08-22 19:52:47 -07:00
sparse.c sparsemem: ensure we initialise the node mapping for SPARSEMEM_STATIC 2007-08-22 19:52:44 -07:00
swap.c Add suspend-related notifications for CPU hotplug 2007-05-09 12:30:56 -07:00
swap_state.c Add __GFP_MOVABLE for callers to flag allocations from high memory that may be migrated 2007-07-17 10:22:59 -07:00
swapfile.c Replace CONFIG_SOFTWARE_SUSPEND with CONFIG_HIBERNATION 2007-07-29 16:45:38 -07:00
thrash.c Bug in mm/thrash.c function grab_swap_token() 2007-05-11 08:29:32 -07:00
tiny-shmem.c [PATCH] mm/{,tiny-}shmem.c cleanups 2007-03-01 14:53:35 -08:00
truncate.c mm: merge populate and nopage into fault (fixes nonlinear) 2007-07-19 10:04:41 -07:00
util.c add kstrndup 2007-07-18 08:47:39 -07:00
vmalloc.c lguest: export symbols for lguest as a module 2007-07-19 10:04:52 -07:00
vmscan.c synchronous lumpy reclaim: wait for page writeback when directly reclaiming contiguous areas 2007-08-22 19:52:45 -07:00
vmstat.c Remove fs.h from mm.h 2007-07-29 17:09:29 -07:00