Jie Zhang ea63763959 nommu: fix malloc performance by adding uninitialized flag ... The NOMMU code currently clears all anonymous mmapped memory. While this is what we want in the default case, all memory allocation from userspace under NOMMU has to go through this interface, including malloc() which is allowed to return uninitialized memory. This can easily be a significant performance penalty. So for constrained embedded systems were security is irrelevant, allow people to avoid clearing memory unnecessarily. This also alters the ELF-FDPIC binfmt such that it obtains uninitialised memory for the brk and stack region. Signed-off-by: Jie Zhang <jie.zhang@analog.com> Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Paul Mundt <lethal@linux-sh.org> Acked-by: Greg Ungerer <gerg@snapgear.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2009-12-15 08:53:24 -08:00
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Kconfig	ksm: remove unswappable max_kernel_pages	2009-12-15 08:53:20 -08:00
Kconfig.debug	trivial: improve help text for mm debug config options	2009-09-21 15:14:57 +02:00
Makefile	percpu: kill legacy percpu allocator	2009-10-02 13:29:29 +09:00
backing-dev.c	flusher: Fix PF_FROZEN race	2009-12-03 13:49:43 +01:00
bootmem.c	mm/bootmem.c: properly __init-annotate helper functions	2009-12-15 08:53:20 -08:00
bounce.c	block: remove some includings of blktrace_api.h	2009-06-16 11:19:36 +02:00
debug-pagealloc.c	generic debug pagealloc	2009-04-01 08:59:13 -07:00
dmapool.c	dmapools: protect page_list walk in show_pools()	2009-06-30 18:56:00 -07:00
fadvise.c	readahead: move max_sane_readahead() calls into force_page_cache_readahead()	2009-06-16 19:47:28 -07:00
failslab.c	kmemtrace, mm: fix slab.h dependency problem in mm/failslab.c	2009-04-03 12:23:01 +02:00
filemap.c	kill wait_on_page_writeback_range	2009-12-10 15:02:50 +01:00
filemap_xip.c	const: mark struct vm_struct_operations	2009-09-27 11:39:25 -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	highmem: Fix debug_kmap_atomic() to also handle KM_IRQ_PTE, KM_NMI, and KM_NMI_PTE	2009-11-10 04:15:47 +01:00
hugetlb.c	hugetlb: abort a hugepage pool resize if a signal is pending	2009-12-15 08:53:24 -08:00
hwpoison-inject.c	HWPOISON: Add simple debugfs interface to inject hwpoison on arbitary PFNs	2009-09-16 11:50:17 +02:00
init-mm.c	mm: consolidate init_mm definition	2009-06-16 19:47:28 -07:00
internal.h	mm: remove unevictable_migrate_page function	2009-12-15 08:53:23 -08:00
kmemcheck.c	kmemcheck: add hooks for the page allocator	2009-06-15 15:48:33 +02:00
kmemleak-test.c	percpu: clean up percpu variable definitions	2009-06-24 15:13:48 +09:00
kmemleak.c	tree-wide: fix typos "aquire" -> "acquire", "cumsumed" -> "consumed"	2009-11-09 09:40:57 +01:00
ksm.c	ksm: remove unswappable max_kernel_pages	2009-12-15 08:53:20 -08:00
maccess.c	[S390] maccess: add weak attribute to probe_kernel_write	2009-06-12 10:27:37 +02:00
madvise.c	Merge branch 'hwpoison' of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6	2009-09-24 07:53:22 -07:00
memcontrol.c	ksm: mem cgroup charge swapin copy	2009-12-15 08:53:19 -08:00
memory-failure.c	mm: CONFIG_MMU for PG_mlocked	2009-12-15 08:53:17 -08:00
memory.c	ksm: let shared pages be swappable	2009-12-15 08:53:19 -08:00
memory_hotplug.c	mm: fix section mismatch in memory_hotplug.c	2009-12-15 08:53:20 -08:00
mempolicy.c	ksm: memory hotremove migration only	2009-12-15 08:53:20 -08:00
mempool.c	mm: remove broken 'kzalloc' mempool	2009-09-22 07:17:35 -07:00
migrate.c	mm: remove unevictable_migrate_page function	2009-12-15 08:53:23 -08:00
mincore.c	mm: hugetlb: fix hugepage memory leak in mincore()	2009-12-15 08:53:24 -08:00
mlock.c	mlock: replace stale comments in munlock_vma_page()	2009-12-15 08:53:23 -08:00
mm_init.c	mm: mminit_loglevel cannot be __meminitdata anymore	2008-08-20 15:40:30 -07:00
mmap.c	mm: uncached vma support with writenotify	2009-12-15 08:53:21 -08:00
mmu_context.c	mm: reduce atomic use on use_mm fast path	2009-09-22 07:17:42 -07:00
mmu_notifier.c	ksm: add mmu_notifier set_pte_at_notify()	2009-09-22 07:17:31 -07:00
mmzone.c	[ARM] Double check memmap is actually valid with a memmap has unexpected holes V2	2009-05-18 11:22:24 +01:00
mprotect.c	perf: Do the big rename: Performance Counters -> Performance Events	2009-09-21 14:28:04 +02:00
mremap.c	Take arch_mmap_check() into get_unmapped_area()	2009-12-11 06:44:58 -05:00
msync.c	[CVE-2009-0029] System call wrappers part 13	2009-01-14 14:15:23 +01:00
nommu.c	nommu: fix malloc performance by adding uninitialized flag	2009-12-15 08:53:24 -08:00
oom_kill.c	oom: dump stack and VM state when oom killer panics	2009-12-15 08:53:10 -08:00
page-writeback.c	writeback: remove unused nonblocking and congestion checks	2009-12-03 13:54:25 +01:00
page_alloc.c	mm: CONFIG_MMU for PG_mlocked	2009-12-15 08:53:17 -08:00
page_cgroup.c	memory hotplug: alloc page from other node in memory online	2009-09-22 07:17:26 -07:00
page_io.c	swap: rework map_swap_page() again	2009-12-15 08:53:16 -08:00
page_isolation.c	memory hotplug: fix page_zone() calculation in test_pages_isolated()	2008-11-06 15:41:19 -08:00
pagewalk.c	mm hugetlb: add hugepage support to pagemap	2009-12-15 08:53:24 -08:00
percpu.c	Merge branch 'for-linus' into for-next	2009-12-08 10:02:12 +09:00
prio_tree.c	spelling fixes: mm/	2007-10-20 01:27:18 +02:00
quicklist.c	cpumask: use new-style cpumask ops in mm/quicklist.	2009-09-24 09:34:52 +09:30
readahead.c	readahead: introduce context readahead algorithm	2009-06-16 19:47:30 -07:00
rmap.c	mm: simplify try_to_unmap_one()	2009-12-15 08:53:20 -08:00
shmem.c	swap_info: note SWAP_MAP_SHMEM	2009-12-15 08:53:16 -08:00
shmem_acl.c	shmfs: use 'check_acl' instead of 'permission'	2009-09-08 11:08:46 -07:00
slab.c	Merge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2009-12-14 10:13:22 -08:00
slob.c	slab: remove duplicate kmem_cache_init_late() declarations	2009-08-06 11:36:25 +03:00
slub.c	Merge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2009-12-14 10:13:22 -08:00
sparse-vmemmap.c	memory hotplug: alloc page from other node in memory online	2009-09-22 07:17:26 -07:00
sparse.c	memory hotplug: alloc page from other node in memory online	2009-09-22 07:17:26 -07:00
swap.c	mm: replace various uses of num_physpages by totalram_pages	2009-09-22 07:17:38 -07:00
swap_state.c	mm: add_to_swap_cache() does not return -EEXIST	2009-09-22 07:17:35 -07:00
swapfile.c	ksm: let shared pages be swappable	2009-12-15 08:53:19 -08:00
thrash.c	mm: pass mm to grab_swap_token	2009-06-23 12:50:05 -07:00
truncate.c	mm: fix comments for invalidate_inode_pages2()	2009-12-04 15:39:48 +01:00
util.c	fix a struct file leak in do_mmap_pgoff()	2009-12-11 06:44:57 -05:00
vmalloc.c	vmalloc(): adjust gfp mask passed on nested vmalloc() invocation	2009-12-15 08:53:13 -08:00
vmscan.c	vmscan: simplify code	2009-12-15 08:53:21 -08:00
vmstat.c	vmscan: stop kswapd waiting on congestion when the min watermark is not being met	2009-12-15 08:53:16 -08:00