linux-kernel - Re: [PATCH 00/19] latest numa/base patches

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Date:	Sat, 17 Nov 2012 16:35:38 +0800
From:	Alex Shi <lkml.alex@...il.com>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	Paul Turner <pjt@...gle.com>,
	Lee Schermerhorn <Lee.Schermerhorn@...com>,
	Christoph Lameter <cl@...ux.com>,
	Rik van Riel <riel@...hat.com>, Mel Gorman <mgorman@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Thomas Gleixner <tglx@...utronix.de>,
	Hugh Dickins <hughd@...gle.com>, Alex Shi <alex.shi@...el.com>
Subject: Re: [PATCH 00/19] latest numa/base patches

Just find imbalance issue on the patchset.

I write a one line program:
int main ()
{
	int i;
	for (i=0; i< 1; )
		__asm__ __volatile__ ("nop");
}
it was compiled with name pl and start it on my 2 socket * 4 cores *
HT NUMA machine:
the cpu domain top like this:
domain 0: span 4,12 level SIBLING
  groups: 4 (cpu_power = 589) 12 (cpu_power = 589)
  domain 1: span 0,2,4,6,8,10,12,14 level MC
   groups: 4,12 (cpu_power = 1178) 6,14 (cpu_power = 1178) 0,8
(cpu_power = 1178) 2,10 (cpu_power = 1178)
   domain 2: span 0,2,4,6,8,10,12,14 level CPU
    groups: 0,2,4,6,8,10,12,14 (cpu_power = 4712)
    domain 3: span 0-15 level NUMA
     groups: 0,2,4,6,8,10,12,14 (cpu_power = 4712) 1,3,5,7,9,11,13,15
(cpu_power = 4712)

$for ((i=0; i< I; i++)); do ./pl & done
when I = 2, they are running on cpu 0,12
I = 4, they are running on cpu 0,9,12,14
I = 8, they are running on cpu 0,4,9,10,11,12,13,14

Regards!
Alex
On Sat, Nov 17, 2012 at 12:25 AM, Ingo Molnar <mingo@...nel.org> wrote:
> This is the split-out series of mm/ patches that got no objections
> from the latest (v15) posting of numa/core. If everyone is still
> fine with these then these will be merge candidates for v3.8.
>
> I left out the more contentious policy bits that people are still
> arguing about.
>
> The numa/base tree can also be found here:
>
>    git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git numa/base
>
> Thanks,
>
>     Ingo
>
> ------------------->
>
> Andrea Arcangeli (1):
>   numa, mm: Support NUMA hinting page faults from gup/gup_fast
>
> Gerald Schaefer (1):
>   sched, numa, mm, s390/thp: Implement pmd_pgprot() for s390
>
> Ingo Molnar (1):
>   mm/pgprot: Move the pgprot_modify() fallback definition to mm.h
>
> Lee Schermerhorn (3):
>   mm/mpol: Add MPOL_MF_NOOP
>   mm/mpol: Check for misplaced page
>   mm/mpol: Add MPOL_MF_LAZY
>
> Peter Zijlstra (7):
>   sched, numa, mm: Make find_busiest_queue() a method
>   sched, numa, mm: Describe the NUMA scheduling problem formally
>   mm/thp: Preserve pgprot across huge page split
>   mm/mpol: Make MPOL_LOCAL a real policy
>   mm/mpol: Create special PROT_NONE infrastructure
>   mm/migrate: Introduce migrate_misplaced_page()
>   mm/mpol: Use special PROT_NONE to migrate pages
>
> Ralf Baechle (1):
>   sched, numa, mm, MIPS/thp: Add pmd_pgprot() implementation
>
> Rik van Riel (5):
>   mm/generic: Only flush the local TLB in ptep_set_access_flags()
>   x86/mm: Only do a local tlb flush in ptep_set_access_flags()
>   x86/mm: Introduce pte_accessible()
>   mm: Only flush the TLB when clearing an accessible pte
>   x86/mm: Completely drop the TLB flush from ptep_set_access_flags()
>
>  Documentation/scheduler/numa-problem.txt | 230 +++++++++++++++++++++++++++++++
>  arch/mips/include/asm/pgtable.h          |   2 +
>  arch/s390/include/asm/pgtable.h          |  13 ++
>  arch/x86/include/asm/pgtable.h           |   7 +
>  arch/x86/mm/pgtable.c                    |   8 +-
>  include/asm-generic/pgtable.h            |   4 +
>  include/linux/huge_mm.h                  |  19 +++
>  include/linux/mempolicy.h                |   8 ++
>  include/linux/migrate.h                  |   7 +
>  include/linux/migrate_mode.h             |   3 +
>  include/linux/mm.h                       |  32 +++++
>  include/uapi/linux/mempolicy.h           |  16 ++-
>  kernel/sched/fair.c                      |  20 +--
>  mm/huge_memory.c                         | 174 +++++++++++++++--------
>  mm/memory.c                              | 119 +++++++++++++++-
>  mm/mempolicy.c                           | 143 +++++++++++++++----
>  mm/migrate.c                             |  85 ++++++++++--
>  mm/mprotect.c                            |  31 +++--
>  mm/pgtable-generic.c                     |   9 +-
>  19 files changed, 807 insertions(+), 123 deletions(-)
>  create mode 100644 Documentation/scheduler/numa-problem.txt
>
> --
> 1.7.11.7
>
> --
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-- 
Thanks
    Alex
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