On Mon, Nov 01, 2010 at 04:06:53PM +0800, liubo wrote:
> On 10/30/2010 09:39 PM, Hugo Mills wrote:
> > This patch introduces a basic form of progress monitoring for balance
> > operations, by counting the number of block groups remaining. The
> > information is exposed to userspace by an ioctl.
> > 
> 
> IMO, tracking the information of blocks which are balancing also makes sense. 
> For example, the block information's blocknr. 
> It can help us monitor better.

   I don't see how that will help. The block group IDs (which is all
that we get at this level) are effectively arbitrary 64-bit numbers,
and are what appear in the kernel logs. How could that information be
used to improve monitoring?

   I'm not ruling out the idea completely -- I just can't see at the
moment how it would be used.

   Hugo.

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