linux-kernel - Re: [patch 2/5] infrastructure to debug (dynamic) objects

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Message-ID: <alpine.LFD.1.00.0803250915330.3781@apollo.tec.linutronix.de>
Date:	Tue, 25 Mar 2008 09:19:11 +0100 (CET)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Andrew Morton <akpm@...ux-foundation.org>
cc:	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>,
	Greg KH <greg@...ah.com>,
	Randy Dunlap <randy.dunlap@...cle.com>,
	Peter Zijlstra <peterz@...radead.org>
Subject: Re: [patch 2/5] infrastructure to debug (dynamic) objects

On Mon, 24 Mar 2008, Andrew Morton wrote:
> On Fri, 21 Mar 2008 20:26:18 -0000
> Thomas Gleixner <tglx@...utronix.de> wrote:
> 
> > The debugobjects core code keeps track of operations on static and
> > dynamic objects by inserting them into a hashed list and sanity
> > checking them on object operations and provides additional checks
> > whenever kernel memory is freed.
> 
> Prime candidates for conversion to this interface are locks: spinlocks,
> rwlocks, mutexes, etc.
> 
> a) it'd be interesting to get that done, as a proof-of-usefulness thing.

/me looks for volunteers :)
 
> b) but this code internally uses spinlocks.  Will it explode?

It should not, but we can use untracked spinlocks for the internals.

> also list_heads and hlists.  But
> 
> a) that might be a bit redundant against the custome debugging which lists
>    already have and

Yup.
 
> b) this code uses lists and hlists internally?

Yes, it uses hlists.

Thanks,

	tglx
 
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