linux-kernel - [PATCH v3 0/3] mm: kmemleak: Use a memory pool for kmemleak object allocations

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Date:   Mon, 12 Aug 2019 17:06:39 +0100
From:   Catalin Marinas <catalin.marinas@....com>
To:     linux-mm@...ck.org
Cc:     linux-kernel@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Michal Hocko <mhocko@...nel.org>,
        Matthew Wilcox <willy@...radead.org>, Qian Cai <cai@....pw>
Subject: [PATCH v3 0/3] mm: kmemleak: Use a memory pool for kmemleak object allocations

Following the discussions on v2 of this patch(set) [1], this series
takes slightly different approach:

- it implements its own simple memory pool that does not rely on the
  slab allocator

- drops the early log buffer logic entirely since it can now allocate
  metadata from the memory pool directly before kmemleak is fully
  initialised

- CONFIG_DEBUG_KMEMLEAK_EARLY_LOG_SIZE option is renamed to
  CONFIG_DEBUG_KMEMLEAK_MEM_POOL_SIZE

- moves the kmemleak_init() call earlier (mm_init())

- to avoid a separate memory pool for struct scan_area, it makes the
  tool robust when such allocations fail as scan areas are rather an
  optimisation

[1] http://lkml.kernel.org/r/20190727132334.9184-1-catalin.marinas@arm.com

Catalin Marinas (3):
  mm: kmemleak: Make the tool tolerant to struct scan_area allocation
    failures
  mm: kmemleak: Simple memory allocation pool for kmemleak objects
  mm: kmemleak: Use the memory pool for early allocations

 init/main.c       |   2 +-
 lib/Kconfig.debug |  11 +-
 mm/kmemleak.c     | 325 ++++++++++++----------------------------------
 3 files changed, 91 insertions(+), 247 deletions(-)