linux-kernel - Re: [PATCH 1/6] writeback: initial tracing support

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Message-ID: <20100528074500.GA14151@infradead.org>
Date:	Fri, 28 May 2010 03:45:00 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Dave Chinner <david@...morbit.com>, linux-kernel@...r.kernel.org,
	xfs@....sgi.com, linux-fsdevel@...r.kernel.org,
	linux-ext4@...r.kernel.org, tytso@....edu, jens.axboe@...cle.com
Subject: Re: [PATCH 1/6] writeback: initial tracing support

On Thu, May 27, 2010 at 02:32:33PM -0700, Andrew Morton wrote:
> > +#define inode_to_bdi(inode)	((inode)->i_mapping->backing_dev_info)
> 
> Could/should be implemented in C.
> 
> > +/*
> > + * We don't actually have pdflush, but this one is exported though /proc...
> > + */
> > +int nr_pdflush_threads;
> 
> So this is always zero now?
> 
> We don't want to keep it forever.  Add a
> printk_once("nr_pdflush_threads is deprecated") when someone reads it,
> remove it in 2014.

These two lines are just moved down a bit by the patch, I think any
cleanups should be left to separate patches.

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