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

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Message-ID: <20090626102008.31a67543@lxorguk.ukuu.org.uk>
Date:	Fri, 26 Jun 2009 10:20:08 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Catalin Marinas <catalin.marinas@....com>
Cc:	Sergey Senozhatsky <sergey.senozhatsky@...l.by>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Ingo Molnar <mingo@...e.hu>,
	"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)

On Fri, 26 Jun 2009 09:54:23 +0100
Catalin Marinas <catalin.marinas@....com> wrote:

> On Fri, 2009-06-26 at 11:50 +0300, Sergey Senozhatsky wrote:
> > On (06/26/09 11:17), Pekka Enberg wrote:
> > > Well, the thing is, I am not sure it's needed if we implement Ingo's
> > > suggestion. After all, syslog is no longer spammed very hard and you can
> > > do all the filtering in userspace when you read /debug/mm/kmemleak file,
> > > no?
> > 
> > Well, we just move 'spam' out of syslog. Not dealing with 'spam' itself.
> > I'm not sure about 'filtering in userspace when you read'. Suppose I use
> > 'tail -f /debug/mm/kmemleak'. How can I easy suppress printing of (for example):
> 
> I don't have a strong opinion on this patch at the moment, I'll have a
> look later today.
> 
> > Or any report with tty_ldisc_try_get (ppp generates tons of them).
> 
> BTW, that's a real leak IMHO (posted a patch yesterday in reply to the
> initial report to Alan Cox).

Yes its on my todo list - probably for early next week along with nailing
down a couple of warnings suggesting there is another race lurking
somewhere.
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