[lvm-devel] [PATCH] Avoid scanning all pvs in the system if operating on a device with mdas.

[Alasdair G Kergon]

On Wed, Mar 17, 2010 at 01:59:02PM -0400, Dave Wysochanski wrote:
> When we pv_read() a device that has an orphan vgname, we might need to scan
> the system to be sure this is true.  However, if the PV has mdas, there's
> no way possible for it to have an orphan vgname unless it is a true orphan.
> Some areas of the code were optimized to take advantage of this fact, while
> others were not (we would still do the expensive scan if a device had mdas
> but had an orphan VG).
> This patch unifies the code so that every place we are operating on such
> a PV, we skip the expensive scan if there are mdas.
 
Makes sense.
Ack.

Alasdair