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    Subject[PATCH 00/35] AutoNUMA alpha14
    Hello everyone,

    It's time for a new autonuma-alpha14 milestone.

    Removed the [RFC] from Subject because 1) this is a release I'm quite
    happy with (from the implementation side it allows the same kernel
    image to boot optimally on NUMA and not-NUMA hardware and it avoids
    altering the scheduler runtime most of the time) and 2) because of the
    great benchmark results we got so far, showing this design so far has
    been proved to perform best.

    I believe (realistically speaking) nobody is going to change
    applications to specify which thread is using which memory (for
    threaded apps) with the only exception of QEMU and a few others.

    For not threaded apps that fits in a NUMA node, there's no way a blind
    home node can perform nearly as good as AutoNUMA: AutoNUMA monitor the
    whole status of the memory of the running processes and it optimizes
    the memory placement and CPU placement dynamically
    accordingly. There's a small memory and CPU cost in collecting so much
    information to be able to make smart decisions, but the benefits
    largely outweight those costs.

    If a big idle task was idle for a long while, but it suddenly start
    computing, AutoNUMA may totally change the memory and CPU placement of
    the other running tasks according to what's best, because it has
    enough information to take optimal NUMA placement decisions.

    git clone --reference linux -b autonuma-alpha14 git:// autonuma-alpha14

    Development autonuma branch (currently equal to autonuma-alpha14 ==

    git clone --reference linux -b autonuma git://
    to update: git fetch; git checkout -f origin/autonuma

    Changelog from alpha13 to alpha14:

    o page_autonuma introduction, no memory wasted if the kernel is booted
    on not-NUMA hardware. Tested with flatmem/sparsemem on x86
    autonuma=y/n and sparsemem/vsparsemem on x86_64 with autonuma=y/n.

    The "noautonuma" kernel param disables autonuma permanently also
    when booted on NUMA hardware (no /sys/kernel/mm/autonuma, and no
    page_autonuma allocations, like cgroup_disable=memory)

    o autonuma_balance only runs along with run_rebalance_domains, to
    avoid altering the scheduler runtime. autonuma_balance gives a
    "kick" to the scheduler only along the load balance events (it
    overrides the load balance activity if needed). This change has not
    yet been tested on specjbb or more schedule intensive benchmarks,
    but I don't expect measurable NUMA affinity regressions. For
    intensive compute loads not involving a flood of scheduling activity
    this has already been verified not to show any performance
    regression, and it will boost the scheduler performance compared to
    previous autonuma releases.

    Note: autonuma_balance still runs from normal context (not softirq
    context like run_rebalance_domains) to be able to wait on process
    migration (avoid _nowait), but most of the time it does nothing at

    Changelog from alpha11 to alpha13:

    o autonuma_balance optimization (take the fast path when process is in
    the preferred NUMA node)


    o THP native migration (orthogonal and also needed for

    o distribute pagecache to other nodes (and maybe shared memory or
    other movable memory) if knuma_migrated stops because the local node
    is full

    Andrea Arcangeli (35):
    mm: add unlikely to the mm allocation failure check
    autonuma: make set_pmd_at always available
    xen: document Xen is using an unused bit for the pagetables
    autonuma: define _PAGE_NUMA_PTE and _PAGE_NUMA_PMD
    autonuma: x86 pte_numa() and pmd_numa()
    autonuma: generic pte_numa() and pmd_numa()
    autonuma: teach gup_fast about pte_numa
    autonuma: introduce kthread_bind_node()
    autonuma: mm_autonuma and sched_autonuma data structures
    autonuma: define the autonuma flags
    autonuma: core autonuma.h header
    autonuma: CPU follow memory algorithm
    autonuma: add page structure fields
    autonuma: knuma_migrated per NUMA node queues
    autonuma: init knuma_migrated queues
    autonuma: autonuma_enter/exit
    autonuma: call autonuma_setup_new_exec()
    autonuma: alloc/free/init sched_autonuma
    autonuma: alloc/free/init mm_autonuma
    autonuma: avoid CFS select_task_rq_fair to return -1
    autonuma: teach CFS about autonuma affinity
    autonuma: sched_set_autonuma_need_balance
    autonuma: core
    autonuma: follow_page check for pte_numa/pmd_numa
    autonuma: default mempolicy follow AutoNUMA
    autonuma: call autonuma_split_huge_page()
    autonuma: make khugepaged pte_numa aware
    autonuma: retain page last_nid information in khugepaged
    autonuma: numa hinting page faults entry points
    autonuma: reset autonuma page data when pages are freed
    autonuma: initialize page structure fields
    autonuma: link mm/autonuma.o and kernel/sched/numa.o
    autonuma: boost khugepaged scanning rate
    autonuma: page_autonuma

    arch/x86/include/asm/paravirt.h | 2 -
    arch/x86/include/asm/pgtable.h | 51 ++-
    arch/x86/include/asm/pgtable_types.h | 22 +-
    arch/x86/mm/gup.c | 2 +-
    fs/exec.c | 3 +
    include/asm-generic/pgtable.h | 12 +
    include/linux/autonuma.h | 53 ++
    include/linux/autonuma_flags.h | 68 ++
    include/linux/autonuma_sched.h | 50 ++
    include/linux/autonuma_types.h | 88 ++
    include/linux/huge_mm.h | 2 +
    include/linux/kthread.h | 1 +
    include/linux/mm_types.h | 5 +
    include/linux/mmzone.h | 18 +
    include/linux/page_autonuma.h | 53 ++
    include/linux/sched.h | 3 +
    init/main.c | 2 +
    kernel/fork.c | 36 +-
    kernel/kthread.c | 23 +
    kernel/sched/Makefile | 1 +
    kernel/sched/core.c | 12 +-
    kernel/sched/fair.c | 72 ++-
    kernel/sched/numa.c | 281 +++++++
    kernel/sched/sched.h | 10 +
    mm/Kconfig | 13 +
    mm/Makefile | 1 +
    mm/autonuma.c | 1464 ++++++++++++++++++++++++++++++++++
    mm/huge_memory.c | 58 ++-
    mm/memory.c | 36 +-
    mm/mempolicy.c | 15 +-
    mm/mmu_context.c | 2 +
    mm/page_alloc.c | 6 +-
    mm/page_autonuma.c | 234 ++++++
    mm/sparse.c | 126 +++-
    34 files changed, 2776 insertions(+), 49 deletions(-)
    create mode 100644 include/linux/autonuma.h
    create mode 100644 include/linux/autonuma_flags.h
    create mode 100644 include/linux/autonuma_sched.h
    create mode 100644 include/linux/autonuma_types.h
    create mode 100644 include/linux/page_autonuma.h
    create mode 100644 kernel/sched/numa.c
    create mode 100644 mm/autonuma.c
    create mode 100644 mm/page_autonuma.c

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