This series of patches proposes use of STACKDEPOT to store user (SLAB_STORE_USER) information of a slub object. As stack traces corresponding to each unique allocation and freeing context can be saved and retrieved from STACKDEPOT, we can reduce size of each object (~256 bytes) and hence save memory without losing any information. *PATCH-1: Makes STACKDEPOT explicitly configurable, so that it can be enabled for storing allocation/freeing stack traces. *PATCH-2: Uses STACKDEPOT to store allocation/freeing context for a slub object. I have marked this series as RFC, so that I can get feedback about this change, because this change just involves debugging framework and does not add any value to production scenarios. Imran Khan (2): lib, stackdepot: Add input prompt for STACKDEPOT option. mm, slub: Use stackdepot to store user information for slub object. lib/Kconfig | 3 +- mm/slub.c | 87 +++++++++++++++++++++++++++++------------------------ 2 files changed, 50 insertions(+), 40 deletions(-) -- 2.25.1
