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d8dfe60d6d
linux/arch/x86/mm
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Alex Shi d8dfe60d6d x86/tlb: fall back to flush all when meet a THP large page 
We don't need to flush large pages by PAGE_SIZE step, that just waste
time. and actually, large page don't need 'invlpg' optimizing according
to our micro benchmark. So, just flush whole TLB is enough for them.

The following result is tested on a 2CPU * 4cores * 2HT NHM EP machine,
with THP 'always' setting.

Multi-thread testing, '-t' paramter is thread number:
                       without this patch 	with this patch
./mprotect -t 1         14ns                       13ns
./mprotect -t 2         13ns                       13ns
./mprotect -t 4         12ns                       11ns
./mprotect -t 8         14ns                       10ns
./mprotect -t 16        28ns                       28ns
./mprotect -t 32        54ns                       52ns
./mprotect -t 128       200ns                      200ns

Signed-off-by: Alex Shi <alex.shi@intel.com>
Link: http://lkml.kernel.org/r/1340845344-27557-4-git-send-email-alex.shi@intel.com
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2012-06-27 19:29:09 -07:00
..
kmemcheck bug.h: add include of it to various implicit C users 2012-02-29 17:15:08 -05:00
amdtopology.c x86, NUMA: Enable CONFIG_AMD_NUMA on 32bit too 2011-05-02 17:24:48 +02:00
dump_pagetables.c x86, mm: Create symbolic index into address_markers array 2010-07-20 16:56:19 -07:00
extable.c x86, extable: Switch to relative exception table entries 2012-04-20 17:22:34 -07:00
fault.c userns: Store uid and gid values in struct cred with kuid_t and kgid_t types 2012-05-03 03:28:38 -07:00
gup.c thp: add compound tail page _mapcount when mapped 2011-12-09 07:50:28 -08:00
highmem_32.c highmem: kill all __kmap_atomic() 2012-03-20 21:48:30 +08:00
hugetlbpage.c hugetlb: remove prev_vma from hugetlb_get_unmapped_area_topdown() 2012-03-21 17:54:59 -07:00
init_32.c Disintegrate asm/system.h for X86 2012-03-28 18:11:12 +01:00
init_64.c Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2012-05-23 11:06:59 -07:00
init.c x86/mm: Only add extra pages count for the first memory range during pre-allocation early page table space 2012-06-08 11:40:50 +02:00
iomap_32.c mm: fix race in kunmap_atomic() 2010-10-27 18:03:05 -07:00
ioremap.c ioremap: Delay sanity check until after a successful mapping 2011-04-29 08:02:47 +02:00
kmmio.c x86, kmmio/mmiotrace: Fix double free of kmmio_fault_pages 2010-06-18 11:30:09 +02:00
Makefile memblock, x86: Replace memblock_x86_reserve/free_range() with generic ones 2011-07-14 11:47:53 -07:00
memtest.c memblock, x86: Replace memblock_x86_reserve/free_range() with generic ones 2011-07-14 11:47:53 -07:00
mmap.c x86: Fix mmap random address range 2011-12-05 17:07:23 +01:00
mmio-mod.c module_param: make bool parameters really bool (arch) 2012-01-13 09:32:18 +10:30
numa_32.c memblock, x86: Replace memblock_x86_reserve/free_range() with generic ones 2011-07-14 11:47:53 -07:00
numa_64.c memblock, x86: Make free_all_memory_core_early() explicitly free lowmem only 2011-07-14 11:47:49 -07:00
numa_emulation.c x86: print physical addresses consistently with other parts of kernel 2012-05-29 16:22:21 -07:00
numa_internal.h x86, NUMA: Initialize and use remap allocator from setup_node_bootmem() 2011-05-02 14:18:54 +02:00
numa.c x86: print physical addresses consistently with other parts of kernel 2012-05-29 16:22:21 -07:00
pageattr-test.c x86: Convert vmalloc()+memset() to vzalloc() 2011-05-28 19:53:57 +02:00
pageattr.c Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2012-01-11 19:12:10 -08:00
pat_internal.h x86, pat: Fix memory leak in free_memtype 2010-05-26 11:26:04 -07:00
pat_rbtree.c rbtree: Undo augmented trees performance damage and regression 2010-07-05 14:43:50 +02:00
pat.c Merge branch 'x86/trampoline' into x86/urgent 2012-05-30 12:11:32 -07:00
pf_in.c x86: Eliminate various 'set but not used' warnings 2011-05-21 19:10:33 +02:00
pf_in.h
pgtable_32.c Disintegrate asm/system.h for X86 2012-03-28 18:11:12 +01:00
pgtable.c x86: Flush TLB if PGD entry is changed in i386 PAE mode 2011-03-18 11:44:01 +01:00
physaddr.c x86: split __phys_addr out into separate file 2009-09-10 11:48:55 -07:00
physaddr.h x86: split __phys_addr out into separate file 2009-09-10 11:48:55 -07:00
setup_nx.c x86, cpu: Only CPU features determine NX capabilities 2010-11-10 15:43:15 -08:00
srat.c x86/numa: Set numa_nodes_parsed at acpi_numa_memory_affinity_init() 2012-06-06 11:58:39 +02:00
testmmiotrace.c x86, kmmio/mmiotrace: Fix double free of kmmio_fault_pages 2010-06-18 11:30:09 +02:00
tlb.c x86/tlb: fall back to flush all when meet a THP large page 2012-06-27 19:29:09 -07:00