linux-kernel - Re: kmemleak suggestion (long message)

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Message-ID: <20090626084228.GA9789@elte.hu>
Date:	Fri, 26 Jun 2009 10:42:28 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Pekka Enberg <penberg@...helsinki.fi>
Cc:	Catalin Marinas <catalin.marinas@....com>,
	Sergey Senozhatsky <sergey.senozhatsky@...l.by>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: kmemleak suggestion (long message)


* Pekka Enberg <penberg@...helsinki.fi> wrote:

> On Fri, 2009-06-26 at 09:25 +0100, Catalin Marinas wrote:
>
> > BTW, this was questioned in the past as well - do we still need 
> > the automatic scanning from a kernel thread? Can a user cron job 
> > just read the kmemleak file?
> 
> I think the kernel thread makes sense so that we get an early 
> warning in syslog. Ingo, what's your take on this from autoqa 
> point of view?

it would be nice to have more relevant messages. Many of the 
messages seem false positives, right? So it would be nice to 
constrain kmemleak into a mode of operation that makes its 
backtraces worth looking at. A message about suspected leaks is 
definitely useful, it just shouldnt be printed too frequently.

	Ingo
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