From: "Roger Pau Monné" <roger.pau@citrix.com>
To: Jan Beulich <JBeulich@suse.com>
Cc: "Oliver Chick (Intern)" <oliver.chick@citrix.com>,
"konrad.wilk@oracle.com" <konrad.wilk@oracle.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"xen-devel@lists.xen.org" <xen-devel@lists.xen.org>
Subject: Re: [Xen-devel] [PATCH v2] Persistent grant maps for xen blk drivers
Date: Tue, 9 Oct 2012 18:39:18 +0200 [thread overview]
Message-ID: <50745336.5080101@citrix.com> (raw)
In-Reply-To: <506061E6020000780009D4AB@nat28.tlf.novell.com>
On 24/09/12 13:36, Jan Beulich wrote:
>>>> On 21.09.12 at 17:52, Oliver Chick <oliver.chick@citrix.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).
I've been working on this a little bit more, and __RING_SIZE returns 32
for all ring types (blkif, blkif_x86_32 and blkif_x86_64), any specific
reason to choose __RING_SIZE()*2?
prev parent reply other threads:[~2012-10-09 16:39 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-21 15:52 [PATCH v2] Persistent grant maps for xen blk drivers Oliver Chick
2012-09-21 18:41 ` Konrad Rzeszutek Wilk
2012-09-21 18:56 ` Konrad Rzeszutek Wilk
2012-09-21 20:46 ` Konrad Rzeszutek Wilk
2012-09-24 14:38 ` Andres Lagar-Cavilla
2012-09-24 15:06 ` Konrad Rzeszutek Wilk
2012-09-24 15:21 ` Andres Lagar-Cavilla
2012-09-27 15:49 ` Oliver Chick
2012-09-24 11:36 ` [Xen-devel] " Jan Beulich
2012-09-24 11:44 ` Ian Campbell
2012-10-09 16:39 ` Roger Pau Monné [this message]
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