linux-kernel - Re: [PATCH 1/6] writeback: pass writeback_control down to move_expired

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Message-ID: <20110504110430.GA4646@infradead.org>
Date:	Wed, 4 May 2011 07:04:32 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	Wu Fengguang <fengguang.wu@...el.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>, Jan Kara <jack@...e.cz>,
	Mel Gorman <mel@...ux.vnet.ibm.com>,
	Mel Gorman <mel@....ul.ie>, Dave Chinner <david@...morbit.com>,
	Itaru Kitayama <kitayama@...bb4u.ne.jp>,
	Minchan Kim <minchan.kim@...il.com>,
	Linux Memory Management List <linux-mm@...ck.org>,
	linux-fsdevel@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/6] writeback: pass writeback_control down to
 move_expired_inodes()

On Wed, Apr 20, 2011 at 04:03:37PM +0800, Wu Fengguang wrote:
> No behavior change. This will add debug visibility to the code, for
> example, to dump the wbc contents when kprobing queue_io().

I don't think it's a good idea.  The writeback_control should move
back to just controlling per-inode writeback and not be passed to
more routines dealing with high-level writeback.

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