David Howells 3a6be87fd1 nommu: clamp zone_batchsize() to 0 under NOMMU conditions ... Clamp zone_batchsize() to 0 under NOMMU conditions to stop free_hot_cold_page() from queueing and batching frees. The problem is that under NOMMU conditions it is really important to be able to allocate large contiguous chunks of memory, but when munmap() or exit_mmap() releases big stretches of memory, return of these to the buddy allocator can be deferred, and when it does finally happen, it can be in small chunks. Whilst the fragmentation this incurs isn't so much of a problem under MMU conditions as userspace VM is glued together from individual pages with the aid of the MMU, it is a real problem if there isn't an MMU. By clamping the page freeing queue size to 0, pages are returned to the allocator immediately, and the buddy detector is more likely to be able to glue them together into large chunks immediately, and fragmentation is less likely to occur. By disabling batching of frees, and by turning off the trimming of excess space during boot, Coldfire can manage to boot. Reported-by: Lanttor Guo <lanttor.guo@freescale.com> Signed-off-by: David Howells <dhowells@redhat.com> Tested-by: Lanttor Guo <lanttor.guo@freescale.com> Cc: Greg Ungerer <gerg@snapgear.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2009-05-06 16:36:10 -07:00
..
allocpercpu.c	percpu: __percpu_depopulate_mask can take a const mask	2009-04-06 13:44:15 -07:00
backing-dev.c	block: change the request allocation/congestion logic to be sync/async based	2009-04-06 08:04:53 -07:00
bootmem.c	bootmem, x86: further fixes for arch-specific bootmem wrapping	2009-03-01 16:06:56 +09:00
bounce.c	bounce: don't rely on a zeroed bio_vec list	2008-12-29 08:29:52 +01:00
debug-pagealloc.c	generic debug pagealloc	2009-04-01 08:59:13 -07:00
dmapool.c	dmapool: enable debugging for CONFIG_SLUB_DEBUG_ON too	2008-04-28 08:58:20 -07:00
fadvise.c	[CVE-2009-0029] System call wrapper special cases	2009-01-14 14:15:18 +01:00
failslab.c	kmemtrace, mm: fix slab.h dependency problem in mm/failslab.c	2009-04-03 12:23:01 +02:00
filemap_xip.c	mm: do_xip_mapping_read: fix length calculation	2009-04-02 19:04:49 -07:00
filemap.c	Export filemap_write_and_wait_range	2009-04-16 07:47:49 -07:00
fremap.c	Do not account for the address space used by hugetlbfs using VM_ACCOUNT	2009-02-10 10:48:42 -08:00
highmem.c	mm: introduce debug_kmap_atomic	2009-04-01 08:59:14 -07:00
hugetlb.c	hugetlb: chg cannot become less than 0	2009-04-01 08:59:13 -07:00
internal.h	nommu: there is no mlock() for NOMMU, so don't provide the bits	2009-04-01 08:59:14 -07:00
Kconfig	mm: point the UNEVICTABLE_LRU config option at the documentation	2009-04-13 15:04:31 -07:00
Kconfig.debug	generic debug pagealloc: build fix	2009-04-02 19:04:48 -07:00
maccess.c
madvise.c	Ignore madvise(MADV_WILLNEED) for hugetlbfs-backed regions	2009-05-05 14:37:58 -07:00
Makefile	generic debug pagealloc	2009-04-01 08:59:13 -07:00
memcontrol.c	memcg: fix mem_cgroup_shrink_usage()	2009-05-02 15:36:09 -07:00
memory_hotplug.c	mm: remove GFP_HIGHUSER_PAGECACHE	2009-01-06 15:59:01 -08:00
memory.c	mm: close page_mkwrite races	2009-05-02 15:36:09 -07:00
mempolicy.c	[CVE-2009-0029] System call wrappers part 28	2009-01-14 14:15:30 +01:00
mempool.c
migrate.c	FS-Cache: Recruit a page flags for cache management	2009-04-03 16:42:36 +01:00
mincore.c	[CVE-2009-0029] System call wrappers part 14	2009-01-14 14:15:24 +01:00
mlock.c	Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2009-02-17 14:27:39 -08:00
mm_init.c	mm: mminit_loglevel cannot be __meminitdata anymore	2008-08-20 15:40:30 -07:00
mmap.c	mm: fix Committed_AS underflow on large NR_CPUS environment	2009-05-02 15:36:10 -07:00
mmu_notifier.c	mmu-notifiers: core	2008-07-28 16:30:21 -07:00
mmzone.c	mm: mark the correct zone as full when scanning zonelists	2008-09-13 14:41:52 -07:00
mprotect.c	Do not account for the address space used by hugetlbfs using VM_ACCOUNT	2009-02-10 10:48:42 -08:00
mremap.c	[CVE-2009-0029] System call wrappers part 13	2009-01-14 14:15:23 +01:00
msync.c	[CVE-2009-0029] System call wrappers part 13	2009-01-14 14:15:23 +01:00
nommu.c	mm: fix Committed_AS underflow on large NR_CPUS environment	2009-05-02 15:36:10 -07:00
oom_kill.c	oom: prevent livelock when oom_kill_allocating_task is set	2009-05-06 16:36:09 -07:00
page_alloc.c	nommu: clamp zone_batchsize() to 0 under NOMMU conditions	2009-05-06 16:36:10 -07:00
page_cgroup.c	memcg: remove redundant message at swapon	2009-04-02 19:04:56 -07:00
page_io.c	block: fix bad definition of BIO_RW_SYNC	2009-02-18 10:32:00 +01:00
page_isolation.c	memory hotplug: fix page_zone() calculation in test_pages_isolated()	2008-11-06 15:41:19 -08:00
page-writeback.c	mm: fix proc_dointvec_userhz_jiffies "breakage"	2009-04-01 08:59:13 -07:00
pagewalk.c	pagemap: pass mm into pagewalkers	2008-06-12 18:05:41 -07:00
pdflush.c	mm: add /proc controls for pdflush threads	2009-04-07 08:31:03 -07:00
percpu.c	percpu: generalize embedding first chunk setup helper	2009-03-10 16:27:48 +09:00
prio_tree.c
quicklist.c	cpumask: replace node_to_cpumask with cpumask_of_node.	2009-03-13 14:49:46 +10:30
readahead.c	FS-Cache: Recruit a page flags for cache management	2009-04-03 16:42:36 +01:00
rmap.c	mm: fix mlocked page counter mismatch	2009-02-11 14:25:35 -08:00
shmem_acl.c	[PATCH] sanitize ->permission() prototype	2008-07-26 20:53:14 -04:00
shmem.c	memcg: fix mem_cgroup_shrink_usage()	2009-05-02 15:36:09 -07:00
slab.c	Merge branch 'kmemtrace-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2009-04-06 13:30:00 -07:00
slob.c	kmemtrace: trace kfree() calls with NULL or zero-length objects	2009-04-03 12:23:10 +02:00
slub.c	kmemtrace: trace kfree() calls with NULL or zero-length objects	2009-04-03 12:23:10 +02:00
sparse-vmemmap.c	vmemmap: warn about page_structs with remote distance	2008-11-06 15:41:19 -08:00
sparse.c	mm: mminit_validate_memmodel_limits(): remove redundant test	2009-04-01 08:59:11 -07:00
swap_state.c	memcg: mem+swap controller core	2009-01-08 08:31:05 -08:00
swap.c	mm: fix Committed_AS underflow on large NR_CPUS environment	2009-05-02 15:36:10 -07:00
swapfile.c	PM/hibernate: fix "swap breaks after hibernation failures"	2009-02-21 14:17:17 -08:00
thrash.c
truncate.c	FS-Cache: Recruit a page flags for cache management	2009-04-03 16:42:36 +01:00
util.c	mm: document get_user_pages_fast()	2009-04-13 15:04:32 -07:00
vmalloc.c	alloc_vmap_area: fix memory leak	2009-05-06 16:36:10 -07:00
vmscan.c	vmscan: avoid multiplication overflow in shrink_zone()	2009-05-02 15:36:10 -07:00
vmstat.c	mm: align vmstat_work's timer	2009-04-02 19:04:48 -07:00