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Raghavendra K T 6d2be915e5 mm/readahead.c: fix readahead failure for memoryless NUMA nodes and limit readahead pages ... Currently max_sane_readahead() returns zero on the cpu whose NUMA node has no local memory which leads to readahead failure. Fix this readahead failure by returning minimum of (requested pages, 512). Users running applications on a memory-less cpu which needs readahead such as streaming application see considerable boost in the performance. Result: fadvise experiment with FADV_WILLNEED on a PPC machine having memoryless CPU with 1GB testfile (12 iterations) yielded around 46.66% improvement. fadvise experiment with FADV_WILLNEED on a x240 machine with 1GB testfile 32GB* 4G RAM numa machine (12 iterations) showed no impact on the normal NUMA cases w/ patch. Kernel Avg Stddev base 7.4975 3.92% patched 7.4174 3.26% [Andrew: making return value PAGE_SIZE independent] Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com> Acked-by: Jan Kara <jack@suse.cz> Cc: Wu Fengguang <fengguang.wu@intel.com> Cc: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		11 years ago
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Kconfig	…
Kconfig.debug	…
Makefile	mm: thrash detection-based file cache sizing	11 years ago
backing-dev.c	…
balloon_compaction.c	…
bootmem.c	…
bounce.c	…
cleancache.c	…
compaction.c	mm/compaction.c: mark function as static	11 years ago
debug-pagealloc.c	…
dmapool.c	…
fadvise.c	…
failslab.c	…
filemap.c	mm: remove read_cache_page_async()	11 years ago
filemap_xip.c	…
fremap.c	…
frontswap.c	…
highmem.c	…
huge_memory.c	mm, thp: drop do_huge_pmd_wp_zero_page_fallback()	11 years ago
hugetlb.c	mm, hugetlb: mark some bootstrap functions as __init	11 years ago
hugetlb_cgroup.c	…
hwpoison-inject.c	…
init-mm.c	…
internal.h	…
interval_tree.c	…
kmemcheck.c	…
kmemleak-test.c	…
kmemleak.c	…
ksm.c	…
list_lru.c	mm: keep page cache radix tree nodes in check	11 years ago
maccess.c	…
madvise.c	…
memblock.c	…
memcontrol.c	…
memory-failure.c	…
memory.c	mm: consolidate code to setup pte	11 years ago
memory_hotplug.c	…
mempolicy.c	mm: optimize put_mems_allowed() usage	11 years ago
mempool.c	…
migrate.c	…
mincore.c	mm + fs: prepare for non-page entries in page cache radix trees	11 years ago
mlock.c	…
mm_init.c	…
mmap.c	mm/mmap.c: mark function as static	11 years ago
mmu_context.c	…
mmu_notifier.c	…
mmzone.c	…
mprotect.c	…
mremap.c	…
msync.c	…
nobootmem.c	mm/nobootmem.c: mark function as static	11 years ago
nommu.c	…
oom_kill.c	…
page-writeback.c	…
page_alloc.c	mm: optimize put_mems_allowed() usage	11 years ago
page_cgroup.c	mm/page_cgroup.c: mark functions as static	11 years ago
page_io.c	…
page_isolation.c	…
pagewalk.c	…
percpu-km.c	…
percpu-vm.c	…
percpu.c	…
pgtable-generic.c	…
process_vm_access.c	mm/process_vm_access.c: mark function as static	11 years ago
quicklist.c	…
readahead.c	mm/readahead.c: fix readahead failure for memoryless NUMA nodes and limit readahead pages	11 years ago
rmap.c	…
shmem.c	mm + fs: prepare for non-page entries in page cache radix trees	11 years ago
slab.c	mm: optimize put_mems_allowed() usage	11 years ago
slab.h	…
slab_common.c	…
slob.c	…
slub.c	slub: do not drop slab_mutex for sysfs_slab_add	11 years ago
sparse-vmemmap.c	…
sparse.c	…
swap.c	mm: thrash detection-based file cache sizing	11 years ago
swap_state.c	…
swapfile.c	…
truncate.c	mm: keep page cache radix tree nodes in check	11 years ago
util.c	…
vmalloc.c	…
vmpressure.c	…
vmscan.c	mm: thrash detection-based file cache sizing	11 years ago
vmstat.c	drop_caches: add some documentation and info message	11 years ago
workingset.c	mm: keep page cache radix tree nodes in check	11 years ago
zbud.c	…
zsmalloc.c	…
zswap.c	…