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    Subject[PATCH 00/21] mm: Preemptibility -v6
    This patch-set makes part of the mm a lot more preemptible. It converts
    i_mmap_lock and anon_vma->lock to mutexes and makes mmu_gather fully

    The main motivation was making mm_take_all_locks() preemptible, since it
    appears people are nesting hundreds of spinlocks there.

    The side-effects are that can finally make mmu_gather preemptible,
    something which lots of people have wanted to do for a long time.

    It also gets us anon_vma refcounting, which seems to result in a nice
    cleanup of the anon_vma lifetime rules wrt KSM and compaction.

    This patch-set is build and boot-tested on x86_64 (a previous version was
    also tested on Dave's Niagra2 machines, and I suppose s390 was too when
    Martin provided the conversion patch for his arch).

    There are no known architectures left unconverted.

    Yanmin ran the -v3 posting through the comprehensive Intel test farm
    and didn't find any regressions.

    ( Not included in this posting are the 4 Sparc64 patches that implement
    gup_fast, those can be applied separately after this series gets
    anywhere. )

    The full series (including the Sparc64 gup_fast bits) also available in -git
    form from (against Linus' tree as of about an hour ago):


    Linus seems to want this to get some serious review and be pushed through
    Andrew (well, anybody but me actually, but since Andrew is mm master...)

    Ben, Thomas, Andrew, can I trick you guys into looking at this stuff?

     \ /
      Last update: 2010-11-26 16:09    [W:0.019 / U:8.184 seconds]
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