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SubjectRe: [PATCH 0/5] Allow more than PAGESIZE data read in configfs
On Mon, Oct 16, 2006 at 12:24:35PM -0700, Chandra Seetharaman wrote:
> On Sat, 2006-10-14 at 13:10 -0700, Joel Becker wrote:
> > Issues of PAGE_SIZE and attribute size aside, the patch posted
> > was incorrect. While they used seq_file, they implemented it in a
>
> I do not think it is incorrect. It provides a simplest interface to
> configfs's clients.

I understand that it provides a simple sed(1)-based change for
existing clients. However, it abuses seq_file in exactly the wrong way.

> > completely inefficent fashion, filling the entire buffer in one ->show()
> > call rather than letting multiple read(2) calls iterate their list.
>
> So, are you suggesting that we should provide a generic seq_operations
> interface to configfs's clients ?

Yes, if we provide a vector type in any way, it should be via
seq_operations or something like it. If we're going to use seq_file, we
should use it correctly.

Joel

--

"What no boss of a programmer can ever understand is that a programmer
is working when he's staring out of the window"
- With apologies to Burton Rascoe


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