linux-kernel - [PATCH 0/3][RFC] mm/page:_owner: track page free call chain

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Date:	Sun,  3 Jul 2016 01:16:53 +0900
From:	Sergey Senozhatsky <sergey.senozhatsky@...il.com>
To:	Joonsoo Kim <iamjoonsoo.kim@....com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Vlastimil Babka <vbabka@...e.cz>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
	Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
Subject: [PATCH 0/3][RFC] mm/page:_owner: track page free call chain

Hello,

	RFC

Page owner tracks a call chain that has allocated a page, this
patch set extends it with a PAGE_OWNER_TRACK_FREE functionality,
that now also tracks a call chain that has freed the page.

Page dump, thus, now has the following format:

	a) page allocated backtrace
	b) page free backtrace
	c) backtrace of path that has trigger bad page

For a quick example of a case when this new b) part can make a
difference please see 0003.

Sergey Senozhatsky (3):
  mm/page_owner: rename page_owner functions
  mm/page_owner: rename PAGE_EXT_OWNER flag
  mm/page_owner: track page free call chain

 include/linux/page_ext.h   |  15 ++++++-
 include/linux/page_owner.h |  16 +++----
 lib/Kconfig.debug          |  10 +++++
 mm/page_alloc.c            |   4 +-
 mm/page_owner.c            | 110 +++++++++++++++++++++++++++++++--------------
 mm/vmstat.c                |   5 ++-
 6 files changed, 113 insertions(+), 47 deletions(-)

-- 
2.9.0.37.g6d523a3