Re: [dm-devel] [PATCH v10 8/8] block: Add bio_clone_bioset(), bio_clone_kmalloc()

[Alasdair G Kergon <agk redhat com>]

On Mon, Sep 17, 2012 at 01:42:27PM -0700, Kent Overstreet wrote:
> Previously, it was open coding __bio_clone(), that's what the setting
> bi_idx to 0 was from. With the change to bio_clone_bioset() that's no
> longer necessary (and dangerous, since bi_idx needs to be consistent
> with bi_sector/bi_size).
 
It was performing a partial clone, deleting any no-longer-needed entries
from the array.  This patch undoes that which is presumably OK because
you propose to eliminate them again in a later one of your patches.

Alasdair