linux-kernel - Re: [PATCH 1/2] split inode_wb_list_lock into bdi_writeback.list

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Date:	Wed, 27 Apr 2011 02:06:42 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Wu Fengguang <fengguang.wu@...el.com>,
	Christoph Hellwig <hch@...radead.org>, Jan Kara <jack@...e.cz>,
	Mel Gorman <mel@...ux.vnet.ibm.com>,
	Dave Chinner <david@...morbit.com>,
	Trond Myklebust <Trond.Myklebust@...app.com>,
	Itaru Kitayama <kitayama@...bb4u.ne.jp>,
	Minchan Kim <minchan.kim@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	"linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
	Linux Memory Management List <linux-mm@...ck.org>
Subject: Re: [PATCH 1/2] split inode_wb_list_lock into bdi_writeback.list_lock

On Tue, Apr 26, 2011 at 02:42:09PM -0700, Andrew Morton wrote:
> Has this patch been well tested under lockdep?

Yes. There's only two places locking two bdis, and both use the
bdi_lock_two helper which imposes an ordering, and tells lockdep about
it.
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