[dm-devel] Re: [PATCH 0/3] sysfs representation of stacked devices (dm/md)

["Jun'ichi Nomura" <j-nomura ce jp nec com>]

Alasdair G Kergon wrote:
> > Speaking about the efficiency, 'dmsetup ls --tree' works well.
> > However, I haven't yet found a efficient way to implement
> > 'dmsetup info --tree -o inverted dm-0', for example.
>  
> Indeed - but what needs this that doesn't also need to scan
> everything?    mount?

mount, fsck and other blkid based tools could be optimized with it.
However, what I had in mind was system administration like just
using dmsetup or looking /sys to check where a device belongs.

--
Jun'ichi Nomura, NEC Solutions (America), Inc.