Re: [Qemu-devel] [PATCH 0/4] qemu-img: conditionally discard target on convert

[Paolo Bonzini <pbonzini@redhat.com>]

Il 16/07/2013 13:18, Peter Lieven ha scritto:
>> Looks good.  Perhaps, as a followup, you can use max_unmap (which I'd
>> rename to max_discard) in bdrv_co_discard to support splitting the
>> request.  You could also export the discard alignment in BlockDriverInfo.
> I already did this in my previous series for iscsi.
> But I can also add a follow
> up if in the future another driver specifies max_discard. I will drop it
> from iscsi again then.

In general, I prefer to have things in the block layer if there is a
chance of them becoming generic.  I guess in this case the chance is
relatively small.

On the other hand, if you add any smartness such as handling alignment
(see http://lkml.org/lkml/2012/7/5/342) please do take the occasion to
move it out of block/iscsi.c.

> Before this patch here is merged, we need the other series "[PATCHv3
> 00/10] iscsi/qemu-img/block-migration enhancements"
> otherwise patch 2/4 will not apply. Maybe you can put it together again
> or I will do a v4 with all patches together.

Perhaps.  Both might also conflict with my get_block_status patches.
I'm going to send an updated version today.  Ugh, it's already 1:30 PM. :(

Paolo