linux-kernel - Re: [PATCH 4/7] fs: break the file_list_lock for sb->s

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Date:	Sun, 28 Jan 2007 16:32:43 +0100
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	Ingo Molnar <mingo@...e.hu>, Andrew Morton <akpm@...l.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/7] fs: break the file_list_lock for sb->s_files

On Sun, 2007-01-28 at 15:30 +0000, Christoph Hellwig wrote:
> On Sun, Jan 28, 2007 at 04:21:06PM +0100, Ingo Molnar wrote:
> > > > sb->s_files is converted to a lock_list. furthermore to prevent the 
> > > > lock_list_head of getting too contended with concurrent add 
> > > > operations the add is buffered in per cpu filevecs.
> > > 
> > > NACK.  Please don't start using lockdep internals in core code.
> > 
> > what do you mean by that?
> 
> struct lock_list is an lockdep implementation detail and should not
> leak out and be used anywhere else.   If we want something similar it
> should be given a proper name and a header of it's own, but I don't
> think it's a valueable abstraction for the core kernel.

please see patch 2/7, its unrelated to lockdep internals.

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