[dm-devel] Re: Was: [patch 1/1] md/dm: Reduce stack usage with stacked block devices
Ming Zhang
mingz at ele.uri.edu
Wed Jan 11 21:00:29 UTC 2006
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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