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Re: [dm-devel] Re: Was: [patch 1/1] md/dm: Reduce stack usage with stacked block devices



On Wed, 2006-01-11 at 20:54 +0000, Alasdair G Kergon wrote:
> On Wed, Jan 11, 2006 at 03:41:11PM -0500, Ming Zhang wrote:
> > does this mean/confirm linux 2.6.x will not have a stable snapshot
> > support any time soon?
>  
> Stable, yes.

yes, we want stable first. 

> Efficient, unlikely with the current implemention - hence the need
> for a rewrite.

> 
> If you have 5 snapshots of the same origin, the current implemention
> takes 5 copies of the data when you change it. That approach is
> never going to scale well!  And it uses lots of memory.

yes, you are right. is there any new rewrite action proposed or planned?

> 
> Next patch is heading for dm-devel in the next hour or so...

thanks!


> 
> Alasdair


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