linux-kernel - Re: Question about memory leak detector giving false positive report for net/core/flow.c

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Message-ID: <alpine.DEB.2.00.1109290907450.9382@router.home>
Date:	Thu, 29 Sep 2011 09:08:47 -0500 (CDT)
From:	Christoph Lameter <cl@...two.org>
To:	Catalin Marinas <catalin.marinas@....com>
cc:	Eric Dumazet <eric.dumazet@...il.com>,
	Huajun Li <huajun.li.lee@...il.com>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	netdev <netdev@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Tejun Heo <tj@...nel.org>
Subject: Re: Question about memory leak detector giving false positive report
 for net/core/flow.c

On Wed, 28 Sep 2011, Catalin Marinas wrote:

> I tried this but it's tricky. The problem is that the percpu pointer
> returned by alloc_percpu() does not directly point to the per-cpu chunks
> and kmemleak would report most percpu allocations as leaks. So far the
> workaround is to simply mark the alloc_percpu() objects as never leaking
> and at least we avoid false positives in other areas. See the patch
> below (note that you have to increase the CONFIG_KMEMLEAK_EARLY_LOG_SIZE
> as there are many alloc_percpu() calls before kmemleak is fully
> initialised):

Seems that kernel.org is out and so tejon wont be seeing these.

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