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    Subject[PATCH v2 0/2] Get callbacks/names of shrinkers from tracepoints
    Currently, it is not possible to know which shrinkers are being run.
    Even though the callbacks are printed using %pF in tracepoints
    mm_shrink_slab_start and mm_shrink_slab_end, they are not visible to
    userspace tools like perf.

    To address this, this patchset
    1. Enables the display of names of shrinker callbacks in tracepoints
    mm_shrink_slab_start and mm_shrink_slab_end.
    2. Adds a new tracepoint in the callback of the superblock shrinker to
    get specific names of superblock types.

    Changes since v1 at https://lkml.org/lkml/2016/7/9/33:
    1. This patchset does not introduce a new variable to hold names of
    shrinkers, unlike v1. It makes mm_shrink_slab_start and
    mm_shrink_slab_end print names of callbacks instead.
    2. It also adds a new tracepoint for superblock shrinkers to display
    more specific name information, which v1 did not do.

    Thanks to Dave Chinner and Tony Jones for their suggestions.

    Janani Ravichandran (2):
    include: trace: Display names of shrinker callbacks
    fs: super.c: Add tracepoint to get name of superblock shrinker

    fs/super.c | 2 ++
    include/trace/events/vmscan.h | 39 +++++++++++++++++++++++++++++++++++++--
    2 files changed, 39 insertions(+), 2 deletions(-)

    --
    2.7.0

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