linux-kernel - Re: Kmemleak for mips

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Date:	Tue, 03 Nov 2009 09:23:47 +0000
From:	Catalin Marinas <catalin.marinas@....com>
To:	"Luis R. Rodriguez" <mcgrof@...il.com>
Cc:	subscriptions@...oomer.com, linux-mm@...ck.org,
	Pekka Enberg <penberg@...helsinki.fi>,
	"John W. Linville" <linville@...driver.com>,
	linux-kernel@...r.kernel.org
Subject: Re: Kmemleak for mips

On Mon, 2009-11-02 at 09:07 -0800, Luis R. Rodriguez wrote:
> Curious what the limitations are on restricting kmemleak to non-mips
> archs. I have a user and situation [1] where this could be helpful [1]
> in debugging an issue. The user reports he cannot enable it on mips.

It may just work but cannot be enabled because I cannot test kmemleak on
such hardware. In general you need to make sure that the _sdata/_edata
and __bss_start/__bss_stop symbols are defined. If there are other ways
of allocating memory than the standard API, it would need additional
hooks. Some false-positives specific to MIPS may need to be annotated
(usually with kmemleak_not_leak).

(btw, you could also merge the kmemleak.git tree on git.kernel.org as it
has improvements on the rate of false positives; the patches will be
pushed in 2.6.33-rc1)

-- 
Catalin

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