linux-kernel - [RFC PATCH 0/2] mm, slub: Use stackdepot to store user information for slub object

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Date:   Tue, 31 Aug 2021 16:25:37 +1000
From:   Imran Khan <imran.f.khan@...cle.com>
To:     cl@...ux.com, akpm@...ux-foundation.org
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: [RFC PATCH 0/2] mm, slub: Use stackdepot to store user information for slub object

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