From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Joao Correia <joaomiguelcorreia@gmail.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
Amerigo Wang <xiyou.wangcong@gmail.com>
Subject: Re: [PATCH 1/3] Increase lockdep limits: MAX_STACK_TRACE_ENTRIES
Date: Tue, 07 Jul 2009 17:33:56 +0200 [thread overview]
Message-ID: <1246980836.9777.5.camel@twins> (raw)
In-Reply-To: <a5d9929e0907070825j1dda6584t93196e2730dedc5c@mail.gmail.com>
On Tue, 2009-07-07 at 16:25 +0100, Joao Correia wrote:
> (Applies to current Linus tree, as of 2.6.31-rc2)
>
> As it stands now, the limit is too low and is being hit by false
> positives. Increasing its value will allow for more room to work with.
>
> This was suggested by Ingo Molnar
> (http://article.gmane.org/gmane.linux.kernel/852005) but never
> submitted as a patch, to the best of my knowledge.
Right, we found a bug in the dma-debug code that generated tons of
classes where only 1 was needed, which in turn generated tons of chains
and stack entries.
But that got merged, but you're seeing more of this?
next prev parent reply other threads:[~2009-07-07 15:34 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-07 15:25 [PATCH 1/3] Increase lockdep limits: MAX_STACK_TRACE_ENTRIES Joao Correia
2009-07-07 15:33 ` Peter Zijlstra [this message]
[not found] ` <a5d9929e0907070838q7ed3306du3bb7880e47d7207b@mail.gmail.com>
2009-07-07 15:38 ` Fwd: " Joao Correia
[not found] ` <1246981444.9777.11.camel@twins>
2009-07-07 15:50 ` Joao Correia
2009-07-07 15:55 ` Peter Zijlstra
2009-07-07 15:59 ` Joao Correia
2009-07-08 17:22 ` Dave Jones
2009-07-08 18:36 ` Peter Zijlstra
2009-07-08 18:44 ` Dave Jones
2009-07-08 19:48 ` Joao Correia
2009-07-08 19:56 ` Peter Zijlstra
2009-07-09 4:39 ` Dave Jones
2009-07-09 8:02 ` Peter Zijlstra
2009-07-09 16:10 ` Dave Jones
2009-07-09 17:07 ` Peter Zijlstra
2009-07-10 15:50 ` Joao Correia
2009-07-09 9:06 ` Catalin Marinas
2009-07-09 9:09 ` Peter Zijlstra
2009-07-20 13:31 ` [PATCH] lockdep: fixup stacktrace wastage Peter Zijlstra
2009-08-02 13:14 ` [tip:core/locking] lockdep: Fix backtraces tip-bot for Peter Zijlstra
2009-08-02 13:51 ` tip-bot for Peter Zijlstra
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