linux-kernel - Re: [PATCH 25/27] r-o-bind-mounts-track-number-of-mount-writers-make-lockdep-happy-with-r-o-bind-mounts

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Message-Id: <20071105153554.908846f9.akpm@linux-foundation.org>
Date:	Mon, 5 Nov 2007 15:35:54 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Dave Hansen <haveblue@...ibm.com>
Cc:	linux-kernel@...r.kernel.org, miklos@...redi.hu, hch@...radead.org,
	haveblue@...ibm.com
Subject: Re: [PATCH 25/27]
 r-o-bind-mounts-track-number-of-mount-writers-make-lockdep-happy-with-r-o-bind-mounts

On Thu, 01 Nov 2007 16:09:00 -0700
Dave Hansen <haveblue@...ibm.com> wrote:

> With the r/o bind mount patches, we can have as many
> spinlocks nested as there are CPUs on the system.
> Lockdep freaks out after 8.
> 
> So, create a new lockdep class of locks for the
> mnt_writer spinlocks, and initialize each of the
> cpu locks to be in a different class.
> 
> It should shut up warnings like this, while still
> allowing some of the lockdep goodness to remain:
> 
> =============================================
> [ INFO: possible recursive locking detected ]
> 2.6.23-rc6 #6
> 

I added your signed-off-by: to this.

I wish you hadn't mucked up all those Subject:s
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