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Aneesh Kumar K.V 675d995297 powerpc/book3s64: Enable split pmd ptlock. 
Testing with a threaded version of mmap_bench which allocate 1G chunks and
with large number of threads we find:

without patch

    32.72%  mmap_bench  [kernel.vmlinux]            [k] do_raw_spin_lock
            |
            ---do_raw_spin_lock
               |
                --32.68%--0
                          |
                          |--15.82%--pte_fragment_alloc
                          |          |
                          |           --15.79%--do_huge_pmd_anonymous_page
                          |                     __handle_mm_fault
                          |                     handle_mm_fault
                          |                     __do_page_fault
                          |                     handle_page_fault
                          |                     test_mmap
                          |                     test_mmap
                          |                     start_thread
                          |                     __clone
                          |
                          |--14.95%--do_huge_pmd_anonymous_page
                          |          __handle_mm_fault
                          |          handle_mm_fault
                          |          __do_page_fault
                          |          handle_page_fault
                          |          test_mmap
                          |          test_mmap
                          |          start_thread
                          |          __clone
                          |

with patch

    12.89%  mmap_bench  [kernel.vmlinux]            [k] do_raw_spin_lock
            |
            ---do_raw_spin_lock
               |
                --12.83%--0
                          |
                          |--3.21%--pagevec_lru_move_fn
                          |          __lru_cache_add
                          |          |
                          |           --2.74%--do_huge_pmd_anonymous_page
                          |                     __handle_mm_fault
                          |                     handle_mm_fault
                          |                     __do_page_fault
                          |                     handle_page_fault
                          |                     test_mmap
                          |                     test_mmap
                          |                     start_thread
                          |                     __clone
                          |
                          |--3.11%--do_huge_pmd_anonymous_page
                          |          __handle_mm_fault
                          |          handle_mm_fault
                          |          __do_page_fault
                          |          handle_page_fault
                          |          test_mmap
                          |          test_mmap
                          |          start_thread
                          |          __clone

.....
                          |
                           --0.55%--pte_fragment_alloc
                                     |
                                      --0.55%--do_huge_pmd_anonymous_page
                                                __handle_mm_fault
                                                handle_mm_fault
                                                __do_page_fault
                                                handle_page_fault
                                                test_mmap
                                                test_mmap
                                                start_thread
                                                __clone

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-05-15 22:29:12 +10:00
..
4xx
powerpc/4xx: Fix error return code in ppc4xx_msi_probe()
2018-03-31 00:10:34 +11:00
8xx
powerpc/8xx: fix cpm_cascade() dual end of interrupt
2018-03-13 15:50:28 +11:00
40x
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
44x
powerpc/44x/fsp2: Add irq error handlers
2017-12-11 13:03:34 +11:00
52xx
powerpc/mpc52xx_gpt: make use of raw_spinlock variants
2018-01-27 21:12:04 +11:00
82xx
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
83xx
powerpc: remove retired sbc834x support
2018-05-03 22:32:30 +10:00
85xx
powerpc/64: Use array of paca pointers and allocate pacas individually
2018-03-30 23:34:23 +11:00
86xx
powerpc: Use pr_warn instead of pr_warning
2017-12-04 11:54:34 +11:00
512x
powerpc: Use pr_warn instead of pr_warning
2017-12-04 11:54:34 +11:00
amigaone
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
cell
powerpc/cell/spufs: Change return type to vm_fault_t
2018-05-14 23:10:34 +10:00
chrp
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
embedded6xx
powerpc/wii: Don't rely on the reserved memory hack
2018-04-01 00:47:43 +11:00
maple
powerpc: Set I/O port resource types correctly
2017-12-18 23:07:45 -06:00
pasemi
powerpc updates for 4.16
2018-02-02 10:01:04 -08:00
powermac
powerpc: Use sizeof(*foo) rather than sizeof(struct foo)
2018-03-20 16:47:53 +11:00
powernv
powerpc/ioda: Use ibm, supported-tce-sizes for IOMMU page size mask
2018-05-14 23:10:33 +10:00
ps3
powerpc: Use sizeof(*foo) rather than sizeof(struct foo)
2018-03-20 16:47:53 +11:00
pseries
powerpc/xive: shutdown XIVE when kexec or kdump is performed
2018-05-10 23:25:09 +10:00
fsl_uli1575.c
of/irq: Refactor interrupt-map parsing
2013-10-24 11:43:04 +01:00
Kconfig
powerpc/cell: Remove axonram driver
2018-01-28 17:00:36 +11:00
Kconfig.cputype
powerpc/book3s64: Enable split pmd ptlock.
2018-05-15 22:29:12 +10:00
Makefile
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00