linux-kernel - Re: [PATCH 0/5] Allow more than PAGESIZE data read in configfs

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Message-ID: <20061014201016.GG2747@ca-server1.us.oracle.com>
Date:	Sat, 14 Oct 2006 13:10:16 -0700
From:	Joel Becker <Joel.Becker@...cle.com>
To:	Andrew Morton <akpm@...l.org>
Cc:	Greg KH <greg@...ah.com>,
	Chandra Seetharaman <sekharan@...ibm.com>,
	ckrm-tech@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/5] Allow more than PAGESIZE data read in configfs

On Sat, Oct 14, 2006 at 12:43:51PM -0700, Andrew Morton wrote:
> On Sat, 14 Oct 2006 01:01:07 -0700
> Greg KH <greg@...ah.com> wrote:
> > Argh!!!!
> > 
> > Are you going to honestly tell me you have a single attribute in sysfs
> > that is larger than PAGE_SIZE?
> 
> He does not.  It's a matter of reusing existing facilities rather than
> impementing similar things in multiple places.  The equivalent patch in
> configfs removed a decent amount of code:

	Issues of PAGE_SIZE and attribute size aside, the patch posted
was incorrect.  While they used seq_file, they implemented it in a
completely inefficent fashion, filling the entire buffer in one ->show()
call rather than letting multiple read(2) calls iterate their list.

Joel

-- 

"Anything that is too stupid to be spoken is sung."  
        - Voltaire

Joel Becker
Principal Software Developer
Oracle
E-mail: joel.becker@...cle.com
Phone: (650) 506-8127
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