linux-kernel - Re: Linux 2.6.24-rc7: sparc64: WARNING: at kernel/lockdep_proc.c:267 lockdep_stats

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Date:	Wed, 9 Jan 2008 01:52:23 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	David Miller <davem@...emloft.net>
Cc:	m.kozlowski@...land.pl, torvalds@...ux-foundation.org,
	linux-kernel@...r.kernel.org, sparclinux@...r.kernel.org,
	a.p.zijlstra@...llo.nl
Subject: Re: Linux 2.6.24-rc7: sparc64: WARNING: at
	kernel/lockdep_proc.c:267 lockdep_stats_show()


* David Miller <davem@...emloft.net> wrote:

> From: Ingo Molnar <mingo@...e.hu>
> Date: Tue, 8 Jan 2008 23:56:31 +0100
> 
> > is this anything the core lockdep code could help improve? Let us know 
> > if any aspect is hindering you.
> 
> No, it's a sparc64 issue.
> 
> Another problem I ran into are the huge static table sizes lockdep 
> uses.  They really need to be either made smaller or dynamically 
> allocated.

Andi has submitted patches for that.

> Sparc64 has hard limitations on kernel size (due to firmware and 
> bootloader issues) and I hit these limits if I am not careful on SMP 
> with lockdep enabled.
> 
> Andi Kleen and I discussed in a thread several weeks ago. I believe 
> Andi even came up with a suggested direction to fix this.

yeah, i'll pick them up, probably tomorrow.

	Ingo
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