From: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
To: benh@kernel.crashing.org, paulus@samba.org, mpe@ellerman.id.au
Cc: linuxppc-dev@lists.ozlabs.org,
"Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Subject: [PATCH V1 00/11] powerpc/mm/book3s64: Support for split pmd ptlock
Date: Mon, 16 Apr 2018 16:57:12 +0530 [thread overview]
Message-ID: <20180416112724.9677-1-aneesh.kumar@linux.ibm.com> (raw)
This patch series add split pmd pagetable lock for book3s64. nohash64 also should
be able to switch to this. I need to workout the code dependency. This series
also migh have broken the build on platforms otherthan book3s64. I am sending this early
to get feedback on whether we should continue with the approach.
We switch the pmd allocator to use something similar to what we already use for
level 4 pagetable allocation. We get an order 0 page and divide that to fragments
and hand over fragments when we get request for a pmd pagetable. The pmd lock is
now stashed in the struct page backing the allocated page.
The series helps in reducing lock contention on mm->page_table_lock.
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
Aneesh Kumar K.V (11):
powerpc/mm/book3s64: Move book3s64 code to pgtable-book3s64
powerpc/kvm: Switch kvm pmd allocator to custom allocator
powerpc/mm: Use pmd_lockptr instead of opencoding it
powerpc/mm: Rename pte fragment functions
powerpc/mm/book3e/64: Remove unsupported 64Kpage size from 64bit booke
powerpc/mm/nohash: Remove pte fragment dependency from nohash
powerpc/mm/book3s64/4k: Switch 4k pagesize config to use pagetable
fragment
powerpc/book3s64/mm: Simplify the rcu callback for page table free
powerpc/mm: Implement helpers for pagetable fragment support at PMD
level
powerpc/mm: Use page fragments for allocation page table at PMD level
powerpc/book3s64: Enable split pmd ptlock.
arch/powerpc/include/asm/book3s/64/hash-4k.h | 8 +-
arch/powerpc/include/asm/book3s/64/hash-64k.h | 7 +
arch/powerpc/include/asm/book3s/64/hash.h | 10 -
arch/powerpc/include/asm/book3s/64/mmu.h | 7 +-
arch/powerpc/include/asm/book3s/64/pgalloc.h | 46 +---
arch/powerpc/include/asm/book3s/64/pgtable.h | 20 +-
arch/powerpc/include/asm/book3s/64/radix-4k.h | 3 +
arch/powerpc/include/asm/book3s/64/radix-64k.h | 4 +
arch/powerpc/include/asm/mmu-book3e.h | 6 -
arch/powerpc/include/asm/nohash/64/pgalloc.h | 95 +++-----
arch/powerpc/include/asm/nohash/64/pgtable-64k.h | 57 -----
arch/powerpc/include/asm/nohash/64/pgtable.h | 8 +-
arch/powerpc/kvm/book3s_64_mmu_radix.c | 36 ++-
arch/powerpc/mm/hash_utils_64.c | 3 +-
arch/powerpc/mm/mmu_context_book3s64.c | 39 +++-
arch/powerpc/mm/pgtable-book3s64.c | 267 ++++++++++++++++++++++-
arch/powerpc/mm/pgtable-hash64.c | 8 +-
arch/powerpc/mm/pgtable-radix.c | 5 +-
arch/powerpc/mm/pgtable_64.c | 171 ---------------
arch/powerpc/platforms/Kconfig.cputype | 4 +
20 files changed, 427 insertions(+), 377 deletions(-)
delete mode 100644 arch/powerpc/include/asm/nohash/64/pgtable-64k.h
--
2.14.3
next reply other threads:[~2018-04-16 11:27 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-16 11:27 Aneesh Kumar K.V [this message]
2018-04-16 11:27 ` [PATCH] powerpc/8xx: Build fix with Hugetlbfs enabled Aneesh Kumar K.V
2018-04-17 12:48 ` Christophe LEROY
2018-04-18 5:42 ` Michael Ellerman
2018-04-30 5:33 ` Aneesh Kumar K.V
2018-04-16 11:27 ` [PATCH V1 01/11] powerpc/mm/book3s64: Move book3s64 code to pgtable-book3s64 Aneesh Kumar K.V
2018-05-16 13:38 ` [V1, " Michael Ellerman
2018-04-16 11:27 ` [PATCH V1 02/11] powerpc/kvm: Switch kvm pmd allocator to custom allocator Aneesh Kumar K.V
2018-04-16 11:27 ` [PATCH V1 03/11] powerpc/mm: Use pmd_lockptr instead of opencoding it Aneesh Kumar K.V
2018-04-16 11:27 ` [PATCH V1 04/11] powerpc/mm: Rename pte fragment functions Aneesh Kumar K.V
2018-04-16 11:27 ` [PATCH V1 05/11] powerpc/mm/book3e/64: Remove unsupported 64Kpage size from 64bit booke Aneesh Kumar K.V
2018-04-16 11:27 ` [PATCH V1 06/11] powerpc/mm/nohash: Remove pte fragment dependency from nohash Aneesh Kumar K.V
2018-04-16 11:27 ` [PATCH V1 07/11] powerpc/mm/book3s64/4k: Switch 4k pagesize config to use pagetable fragment Aneesh Kumar K.V
2018-04-16 11:27 ` [PATCH V1 08/11] powerpc/book3s64/mm: Simplify the rcu callback for page table free Aneesh Kumar K.V
2018-04-16 11:27 ` [PATCH V1 09/11] powerpc/mm: Implement helpers for pagetable fragment support at PMD level Aneesh Kumar K.V
2018-04-16 11:27 ` [PATCH V1 10/11] powerpc/mm: Use page fragments for allocation page table " Aneesh Kumar K.V
2018-04-16 11:27 ` [PATCH V1 11/11] powerpc/book3s64: Enable split pmd ptlock Aneesh Kumar K.V
2018-04-17 22:43 ` [PATCH V1 00/11] powerpc/mm/book3s64: Support for " Balbir Singh
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