Re: buffer cache & ufs changes (preliminary ffsv2 extattr support)

[yamt%mwd.biglobe.ne.jp@localhost (YAMAMOTO Takashi)]

hi,

> On Mon, Jan 16, 2012 at 10:00:05PM +0000, YAMAMOTO Takashi wrote:
>> have you considered to separate the entity being cached from vnode?
> 
> What would this buy us ? the data are intimely tied to the inode, cleaning
> the cache when a file is deleted or would be more difficult, isn't it ?

it allows us to have more than one such entities for a vnode.
it's what you want here, isn't it?

YAMAMOTO Takashi

> 
>> iirc, irix called it "buffer cache target" or such.
>> your vtruncbuf2 function seems to imply needs to have separate
>> v_dirtyblkhd/v_cleanblkhd for each types.
> 
> It's possible, I didn't look at vnode cleaning yet.
> 
> -- 
> Manuel Bouyer <bouyer%antioche.eu.org@localhost>
>      NetBSD: 26 ans d'experience feront toujours la difference
> --