linux-kernel - Re: [Xen-devel] [PATCH v2] Persistent grant maps for xen blk drivers

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Message-Id: <506061E6020000780009D4AB@nat28.tlf.novell.com>
Date:	Mon, 24 Sep 2012 12:36:38 +0100
From:	"Jan Beulich" <JBeulich@...e.com>
To:	"Oliver Chick" <oliver.chick@...rix.com>
Cc:	<xen-devel@...ts.xen.org>, <konrad.wilk@...cle.com>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [Xen-devel] [PATCH v2] Persistent grant maps for xen blk
 drivers

>>> On 21.09.12 at 17:52, Oliver Chick <oliver.chick@...rix.com> wrote:
> Changes since v1:
> 
>  * Maximum number of persistent grants per device now 64, rather than
>    256, as this is the actual maxmimum request in a (1 page) ring.

As said previously, I don't see why this needs to have a separate
#define at all - it's simply __RING_SIZE(). No adding this would
also imply that - apart from perhaps documenting the new xenstore
nodes - io/blkif.h would need changing at all (which otherwise would
require a hypervisor side patch to be submitted too).

Jan

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