26 Mar, 2016

1 commit

• cd11016e5   mm, kasan: stackdepot implementation. Enable stackdepot for SLAB ... Browse Code »

  Implement the stack depot and provide CONFIG_STACKDEPOT. Stack depot
  will allow KASAN store allocation/deallocation stack traces for memory
  chunks. The stack traces are stored in a hash table and referenced by
  handles which reside in the kasan_alloc_meta and kasan_free_meta
  structures in the allocated memory chunks.

  IRQ stack traces are cut below the IRQ entry point to avoid unnecessary
  duplication.

  Right now stackdepot support is only enabled in SLAB allocator. Once
  KASAN features in SLAB are on par with those in SLUB we can switch SLUB
  to stackdepot as well, thus removing the dependency on SLUB stack
  bookkeeping, which wastes a lot of memory.

  This patch is based on the "mm: kasan: stack depots" patch originally
  prepared by Dmitry Chernenkov.

  Joonsoo has said that he plans to reuse the stackdepot code for the
  mm/page_owner.c debugging facility.

  [akpm@linux-foundation.org: s/depot_stack_handle/depot_stack_handle_t]
  [aryabinin@virtuozzo.com: comment style fixes]
  Signed-off-by: Alexander Potapenko
  Signed-off-by: Andrey Ryabinin
  Cc: Christoph Lameter
  Cc: Pekka Enberg
  Cc: David Rientjes
  Cc: Joonsoo Kim
  Cc: Andrey Konovalov
  Cc: Dmitry Vyukov
  Cc: Steven Rostedt
  Cc: Konstantin Serebryany
  Cc: Dmitry Chernenkov
  Signed-off-by: Andrew Morton
  Signed-off-by: Linus Torvalds

  Alexander Potapenko

  2016-03-26 07:37:42 +0800