Re: 2.6.16.20/dm: can't create more then one snapshot of an lv

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On Tue, Jun 20, 2006 at 01:55:45PM +0200, Heinz Mauelshagen wrote:
> On Tue, Jun 20, 2006 at 09:46:13PM +1000, CaT wrote:
> > On Tue, Jun 20, 2006 at 12:02:09PM +0200, Heinz Mauelshagen wrote:
> > > How many snapshots active at once ?
> > 
> > 1. I can start more then 1 premade snapshots just fine and use them
> > but the moment I add another one a freeze occurs.
> 
> Well, that's fairly few ;)

Yes. I thought so too. :)

> > > I guess this is a kcopyd scalability issue which needs addressing.
> > 
> > Well in the end I'm hoping to get at least 7. Hopefully that's not
> > insane. :)
> 
> No, I was assuming, you were trying to activate plenty.

Not yet. Though as I said I plan to max out at 7 or so.

> FYI: the snapshot code in 2.6.17-rc has received a fair amount of fixes
>      which might help this vs. 2.6.16.20.

I tried 2.6.17 and I get the same issue. Any other kernel you want me to
try? I can reboot this box at will at the moment and test.

-- 
    "To the extent that we overreact, we proffer the terrorists the
    greatest tribute."
    	- High Court Judge Michael Kirby
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