Re: [PATCH v4] kmemleak: survive in a low-memory situation

[Qian Cai]

On 3/27/19 1:29 PM, Catalin Marinas wrote:
> From dc4194539f8191bb754901cea74c86e7960886f8 Mon Sep 17 00:00:00 2001
> From: Catalin Marinas <catalin.marinas@xxxxxxx>
> Date: Wed, 27 Mar 2019 17:20:57 +0000
> Subject: [PATCH] mm: kmemleak: Add an emergency allocation pool for kmemleak
>  objects
> 
> This patch adds an emergency pool for struct kmemleak_object in case the
> normal kmem_cache_alloc() fails under the gfp constraints passed by the
> slab allocation caller. The patch also removes __GFP_NOFAIL which does
> not play well with other gfp flags (introduced by commit d9570ee3bd1d,
> "kmemleak: allow to coexist with fault injection").
> 
> Suggested-by: Michal Hocko <mhocko@xxxxxxxxxx>
> Signed-off-by: Catalin Marinas <catalin.marinas@xxxxxxx>

It takes 2 runs of LTP oom01 tests to disable kmemleak.