Re: [RFC] [Patch 3/3] readahead statistics slimmed down

[Martin Peschke <mp3@de.ibm.com>]

Fengguang Wu wrote:
> 2007/5/3, Martin Peschke <mp3@de.ibm.com>:
> > This patch implements the bulk of the existing the adaptive readahead
> > statistics with lib/statistics.c.
> >
> > The output format differs somewhat as the the statistics code just emits
> > lists of items and doesn't do tables. It is feasible to leave
> > reformating and beautification to some user scripts, if needed. This
> > patch omits some summary data, most of which can be done in user space
> > as well.
> >
> > Sample output (from dd'ing a disk):
> >
> > cache_miss.total 0 0
> > cache_miss.initial 0 0
> > cache_miss.clock 10 10
> > cache_miss.context 0 0
>
>
> Martin,
>
> The new form of readahead statistics is appreciated. The code is much
> simpler and the output is suitable for scripting. Thank you for doing the
> conversion.
>
> Me too have trimmed out the original ra_events_show() stuff based on your
> patches. However, later on it becomes obvious that the current adaptive
> readahead patch needs non-trivial rework. So the accounting patches were 
> put
> off. Expect to see them in the adaptive readahead kernel module ;-)
>
> Thank you,
> Fengguang Wu

I have been wondering whether this one might be worth staging in -mm along with 
the other readahead patches. It would be work be work in progress like the other 
readahead patches. But I leave this decision to you and Andrew.

THanks for the positive feedback.

Martin

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