[PATCH 0/6] android: binder: move allocator metadata and add shrinker

[Sherry Yang <sherryy@android.com>]

This patch set moves internal kernel data in the binder
driver out of mmap regions that is readable by user space.
A shrinker is added to the driver to dynamically manage
the memory used by binder transactions and only free pages
when the system is under memory pressure. This patch set
also adds tests and refactoring in binder allocator.

      android: binder: Refactor prev and next buffer into a helper function
      android: binder: Add allocator selftest
      android: binder: Move buffer out of area shared with user space
      android: binder: Add global lru shrinker to binder
      android: binder: Add shrinker tracepoints
      android: binder: Add page usage in binder stats

v3: Fix crash if open is called without followed by mmap.
Also add page usage information in binder stats

 drivers/android/Kconfig                 |  10 +
 drivers/android/Makefile                |   1 +
 drivers/android/binder.c                |   6 +
 drivers/android/binder_alloc.c          | 395 ++++++++++++++++------
 drivers/android/binder_alloc.h          |  32 +-
 drivers/android/binder_alloc_selftest.c | 310 ++++++++++++++++++
 drivers/android/binder_trace.h          |  55 ++++
 7 files changed, 711 insertions(+), 98 deletions(-)