linux/arch/sh/mm
Linus Torvalds 3d59eebc5e Automatic NUMA Balancing V11
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Merge tag 'balancenuma-v11' of git://git.kernel.org/pub/scm/linux/kernel/git/mel/linux-balancenuma

Pull Automatic NUMA Balancing bare-bones from Mel Gorman:
 "There are three implementations for NUMA balancing, this tree
  (balancenuma), numacore which has been developed in tip/master and
  autonuma which is in aa.git.

  In almost all respects balancenuma is the dumbest of the three because
  its main impact is on the VM side with no attempt to be smart about
  scheduling.  In the interest of getting the ball rolling, it would be
  desirable to see this much merged for 3.8 with the view to building
  scheduler smarts on top and adapting the VM where required for 3.9.

  The most recent set of comparisons available from different people are

    mel:    https://lkml.org/lkml/2012/12/9/108
    mingo:  https://lkml.org/lkml/2012/12/7/331
    tglx:   https://lkml.org/lkml/2012/12/10/437
    srikar: https://lkml.org/lkml/2012/12/10/397

  The results are a mixed bag.  In my own tests, balancenuma does
  reasonably well.  It's dumb as rocks and does not regress against
  mainline.  On the other hand, Ingo's tests shows that balancenuma is
  incapable of converging for this workloads driven by perf which is bad
  but is potentially explained by the lack of scheduler smarts.  Thomas'
  results show balancenuma improves on mainline but falls far short of
  numacore or autonuma.  Srikar's results indicate we all suffer on a
  large machine with imbalanced node sizes.

  My own testing showed that recent numacore results have improved
  dramatically, particularly in the last week but not universally.
  We've butted heads heavily on system CPU usage and high levels of
  migration even when it shows that overall performance is better.
  There are also cases where it regresses.  Of interest is that for
  specjbb in some configurations it will regress for lower numbers of
  warehouses and show gains for higher numbers which is not reported by
  the tool by default and sometimes missed in treports.  Recently I
  reported for numacore that the JVM was crashing with
  NullPointerExceptions but currently it's unclear what the source of
  this problem is.  Initially I thought it was in how numacore batch
  handles PTEs but I'm no longer think this is the case.  It's possible
  numacore is just able to trigger it due to higher rates of migration.

  These reports were quite late in the cycle so I/we would like to start
  with this tree as it contains much of the code we can agree on and has
  not changed significantly over the last 2-3 weeks."

* tag 'balancenuma-v11' of git://git.kernel.org/pub/scm/linux/kernel/git/mel/linux-balancenuma: (50 commits)
  mm/rmap, migration: Make rmap_walk_anon() and try_to_unmap_anon() more scalable
  mm/rmap: Convert the struct anon_vma::mutex to an rwsem
  mm: migrate: Account a transhuge page properly when rate limiting
  mm: numa: Account for failed allocations and isolations as migration failures
  mm: numa: Add THP migration for the NUMA working set scanning fault case build fix
  mm: numa: Add THP migration for the NUMA working set scanning fault case.
  mm: sched: numa: Delay PTE scanning until a task is scheduled on a new node
  mm: sched: numa: Control enabling and disabling of NUMA balancing if !SCHED_DEBUG
  mm: sched: numa: Control enabling and disabling of NUMA balancing
  mm: sched: Adapt the scanning rate if a NUMA hinting fault does not migrate
  mm: numa: Use a two-stage filter to restrict pages being migrated for unlikely task<->node relationships
  mm: numa: migrate: Set last_nid on newly allocated page
  mm: numa: split_huge_page: Transfer last_nid on tail page
  mm: numa: Introduce last_nid to the page frame
  sched: numa: Slowly increase the scanning period as NUMA faults are handled
  mm: numa: Rate limit setting of pte_numa if node is saturated
  mm: numa: Rate limit the amount of memory that is migrated between nodes
  mm: numa: Structures for Migrate On Fault per NUMA migration rate limiting
  mm: numa: Migrate pages handled during a pmd_numa hinting fault
  mm: numa: Migrate on reference policy
  ...
2012-12-16 15:18:08 -08:00
..
alignment.c sh: use printk_ratelimited instead of printk_ratelimit 2011-06-30 15:10:06 +09:00
asids-debugfs.c sh: provide generic arch_debugfs_dir. 2010-09-24 04:04:26 +09:00
cache-debugfs.c sh: fix wrong icache/dcache address-array start addr in cache-debugfs. 2011-06-06 12:30:02 +09:00
cache-sh2.c sh: Mass ctrl_in/outX to __raw_read/writeX conversion. 2010-01-26 12:58:40 +09:00
cache-sh2a.c sh: Fix sh2a build error for CONFIG_CACHE_WRITETHROUGH 2012-02-24 13:21:46 +09:00
cache-sh3.c sh: Mass ctrl_in/outX to __raw_read/writeX conversion. 2010-01-26 12:58:40 +09:00
cache-sh4.c sh: fix up fallout from system.h disintegration. 2012-03-30 19:29:57 +09:00
cache-sh5.c tree-wide: fix comment/printk typos 2010-11-01 15:38:34 -04:00
cache-sh7705.c sh: Assume new page cache pages have dirty dcache lines. 2010-12-01 15:39:51 +09:00
cache-shx3.c sh: Zero out aliases counter when using SH-X3 hardware assistance. 2010-04-20 15:37:23 +09:00
cache.c sh: remove the second argument of k[un]map_atomic() 2012-03-20 21:48:15 +08:00
consistent.c SH: adapt for dma_map_ops changes 2012-03-28 16:36:37 +02:00
extable_32.c sh: Split out extable.c _32 and _64 variants. 2008-01-28 13:18:44 +09:00
extable_64.c sh: comment tidying for sh64->sh migration. 2008-01-28 13:18:58 +09:00
fault.c mm, oom: remove statically defined arch functions of same name 2012-12-12 17:38:34 -08:00
flush-sh4.c sh: fix up fallout from system.h disintegration. 2012-03-30 19:29:57 +09:00
gup.c sh: lockless get_user_pages_fast() 2010-10-27 16:43:08 +09:00
hugetlbpage.c thp: pte alloc trans splitting 2011-01-13 17:32:40 -08:00
init.c memblock: s/memblock_analyze()/memblock_allow_resize()/ and update users 2011-12-08 10:22:08 -08:00
ioremap_fixed.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
ioremap.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
Kconfig mm: numa: Add fault driven placement and migration 2012-12-11 14:42:45 +00:00
kmap.c sh: Assume new page cache pages have dirty dcache lines. 2010-12-01 15:39:51 +09:00
Makefile sh64: Fix up caller-save register settings for fast-path. 2012-05-14 16:46:07 +09:00
mmap.c Merge branch 'akpm' (Andrew's patchbomb) 2012-12-11 18:05:37 -08:00
nommu.c sh: stub __flush_tlb_global() definition for nommu. 2010-08-16 14:53:01 +09:00
numa.c lmb: rename to memblock 2010-07-14 17:14:00 +10:00
pgtable.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
pmb.c Disintegrate asm/system.h for SH 2012-03-28 18:30:03 +01:00
sram.c sh: fix up fallout from system.h disintegration. 2012-03-30 19:29:57 +09:00
tlb-debugfs.c sh: provide generic arch_debugfs_dir. 2010-09-24 04:04:26 +09:00
tlb-pteaex.c Disintegrate asm/system.h for SH 2012-03-28 18:30:03 +01:00
tlb-sh3.c Disintegrate asm/system.h for SH 2012-03-28 18:30:03 +01:00
tlb-sh4.c Disintegrate asm/system.h for SH 2012-03-28 18:30:03 +01:00
tlb-sh5.c sh64: Fix up section mismatch warnings. 2012-06-14 15:05:53 +09:00
tlb-urb.c sh: update the TLB replacement counter for entry wiring. 2010-03-26 11:37:16 +09:00
tlbex_32.c sh: Enable shared page fault handler for _32/_64. 2012-05-14 15:33:28 +09:00
tlbex_64.c sh64: Set additional fault code values. 2012-05-14 17:46:49 +09:00
tlbflush_32.c sh: Provide a global TLB flush for U/I-TLB clear. 2010-07-02 15:44:09 +09:00
tlbflush_64.c sh64: Migrate to __update_tlb() API. 2012-05-14 15:52:28 +09:00
uncached.c sh: nommu: use 32-bit phys mode. 2010-11-04 12:32:24 +09:00