new class / geom_cache / request for comments

[Eric Anderson]

R. B. Riddick wrote:
> Hiho!
> 
> I just wrote a new(?) GEOM class:
>   geom_cache
> 
> It is my very first GEOM class and my first larger kernel code...
> I took it mostly from geom_concat... :-)
> It was quite easy to change the behaviour of geom_concat...
> 
> The advantage of geom_cache is, that (even if we have a hard disc with a cache)
> we can avoid reading the same area twice. I cared for segmentation of the cache
> space a little bit by using a stripe size. The cache is always clean
> (hopefully), so that it should not be dangerous to use geom_cache (if I did
> everything right enough).
> 
> I attached a bzip'ed tar file although it is about 15KB large.
> 
> I would be glad,
> 1. if somebody tells me, what I did wrong (especially that license stuff and
> the man page (I dont know man page language) might be wrong)
> and
> 2. if somebody can use it.
> 
> I plan to use it for my next GEOM class (geom_raid5), where it might be useful
> in case of sequential read from a degraded provider (or is there a smarter way
> to do it?).
> 
> Bye
> Arne

Hi Arne!

Just curious, how is this different/better than the regular buffer cache?


Eric


-- 
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Eric Anderson        Sr. Systems Administrator        Centaur Technology
Anything that works is better than anything that doesn't.
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