linux-kernel - [PATCH v2 0/2] kmemleak: support for percpu memory leak detect

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Message-ID: <20240731025526.157529-1-ptikhomirov@virtuozzo.com>
Date: Wed, 31 Jul 2024 10:54:08 +0800
From: Pavel Tikhomirov <ptikhomirov@...tuozzo.com>
To: Catalin Marinas <catalin.marinas@....com>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc: linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	Wei Yongjun <weiyongjun1@...wei.com>,
	Chen Jun <chenjun102@...wei.com>,
	Aleksandr Mikhalitsyn <aleksandr.mikhalitsyn@...onical.com>,
	Pavel Tikhomirov <ptikhomirov@...tuozzo.com>,
	kernel@...nvz.org
Subject: [PATCH v2 0/2] kmemleak: support for percpu memory leak detect

This is a rework of this series:
https://lore.kernel.org/lkml/20200921020007.35803-1-chenjun102@huawei.com/

Originally I was investigating a percpu leak on our customer nodes and
having this functionality was a huge help, which lead to this fix [1].

So probably it's a good idea to have it in mainstream too, especially as
after [2] it became much easier to implement (we already have a separate
tree for percpu pointers).

commit 0af8c09c89681 ("netfilter: x_tables: fix percpu counter block
leak on error path when creating new netns") [1]
commit 39042079a0c24 ("kmemleak: avoid RCU stalls when freeing metadata
for per-CPU pointers") [2]

Pavel Tikhomirov (2):
  kmemleak: enable tracking for percpu pointers
  kmemleak-test: add percpu leak

 mm/kmemleak.c                    | 153 +++++++++++++++++++------------
 samples/kmemleak/kmemleak-test.c |   2 +
 2 files changed, 96 insertions(+), 59 deletions(-)

-- 
2.45.2