linux-kernel - Re: combinatorial explosion in lockdep

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Message-Id: <20080729.235623.211977761.davem@davemloft.net>
Date:	Tue, 29 Jul 2008 23:56:23 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	mingo@...e.hu
Cc:	peterz@...radead.org, linux-kernel@...r.kernel.org
Subject: Re: combinatorial explosion in lockdep

From: David Miller <davem@...emloft.net>
Date: Tue, 29 Jul 2008 21:45:03 -0700 (PDT)

> If we can agree on this as a fix, it should definitely be backported
> and submitted for -stable :-)
> 
> ----------------------------------------
> 
> lockdep: Fix combinatorial explosion in lock subgraph traversal.

So the next problem I run into is that 8192 is not a large
enough MAX_LOCKDEP_ENTRIES for this larger cpu count boxes.
8192 isn't even big enough for my 64 cpu box.

It needs to be scaled by NR_CPUS, or something like that.
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