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    Subject[PATCH v13 00/16] kmemcg shrinkers

    This is the 13th iteration of Glauber Costa's patch-set implementing slab
    shrinking on memcg pressure. The main idea is to make the list_lru structure
    used by most FS shrinkers per-memcg. When adding or removing an element from a
    list_lru, we use the page information to figure out which memcg it belongs to
    and relay it to the appropriate list. This allows scanning kmem objects
    accounted to different memcgs independently.

    Please note that in contrast to previous versions this patch-set implements
    slab shrinking only when we hit the user memory limit so that kmem allocations
    will still fail if we are below the user memory limit, but close to the kmem
    limit. This is, because the implementation of kmem-only reclaim was rather
    incomplete - we had to fail GFP_NOFS allocations since everything we could
    reclaim was only FS data. I will try to improve this and send in a separate
    patch-set, but currently it is only worthwhile setting the kmem limit to be
    greater than the user mem limit just to enable per-memcg slab accounting and

    The patch-set is based on top of Linux-3.13-rc3 and organized as follows:
    - patches 1-9 prepare vmscan, memcontrol, list_lru to kmemcg reclaim;
    - patch 10 implements the kmemcg reclaim core;
    - patch 11 makes the list_lru struct per-memcg and patch 12 marks all
    list_lru-based shrinkers as memcg-aware;
    - patches 13-16 slightly improve memcontrol behavior regarding mem reclaim.

    Changes in v13:
    - fix NUMA-unaware shrinkers not being called when node 0 is not set in the
    - rework list_lru API to require a shrink_control
    - make list_lru automatically handle memcgs w/o introducing a separate struct;
    - simplify walk over all memcg LRUs of a list_lru;
    - cleanup shrink_slab()
    - remove kmem-only reclaim as explained above;

    Previous iterations of this patch-set can be found here:


    Glauber Costa (7):
    memcg: make cache index determination more robust
    memcg: consolidate callers of memcg_cache_id
    memcg: move initialization to memcg creation
    vmscan: take at least one pass with shrinkers
    vmpressure: in-kernel notifications
    memcg: reap dead memcgs upon global memory pressure
    memcg: flush memcg items upon memcg destruction

    Vladimir Davydov (9):
    memcg: move memcg_caches_array_size() function
    vmscan: move call to shrink_slab() to shrink_zones()
    vmscan: remove shrink_control arg from do_try_to_free_pages()
    vmscan: call NUMA-unaware shrinkers irrespective of nodemask
    mm: list_lru: require shrink_control in count, walk functions
    fs: consolidate {nr,free}_cached_objects args in shrink_control
    vmscan: shrink slab on memcg pressure
    mm: list_lru: add per-memcg lists
    fs: mark list_lru based shrinkers memcg aware

    fs/dcache.c | 17 +-
    fs/gfs2/quota.c | 10 +-
    fs/inode.c | 8 +-
    fs/internal.h | 9 +-
    fs/super.c | 24 ++-
    fs/xfs/xfs_buf.c | 16 +-
    fs/xfs/xfs_qm.c | 8 +-
    fs/xfs/xfs_super.c | 6 +-
    include/linux/fs.h | 6 +-
    include/linux/list_lru.h | 83 ++++++----
    include/linux/memcontrol.h | 35 ++++
    include/linux/shrinker.h | 10 +-
    include/linux/vmpressure.h | 5 +
    mm/list_lru.c | 263 +++++++++++++++++++++++++++---
    mm/memcontrol.c | 384 +++++++++++++++++++++++++++++++++++++++-----
    mm/vmpressure.c | 53 +++++-
    mm/vmscan.c | 172 +++++++++++++-------
    17 files changed, 888 insertions(+), 221 deletions(-)


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