linux-kernel - Re: [PATCH RFC 3/4] xen, blkfront: introduce support for multiple hw queues

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Message-ID: <20140911233615.GA2052@gmail.com>
Date:	Fri, 12 Sep 2014 01:36:17 +0200
From:	Arianna Avanzini <avanzini.arianna@...il.com>
To:	David Vrabel <david.vrabel@...rix.com>
Cc:	konrad.wilk@...cle.com, boris.ostrovsky@...cle.com,
	xen-devel@...ts.xenproject.org, linux-kernel@...r.kernel.org,
	bob.liu@...cle.com, felipe.franciosi@...rix.com, axboe@...com
Subject: Re: [PATCH RFC 3/4] xen, blkfront: introduce support for multiple hw
 queues

Hello,

thank you for all your comments and sorry if it took so long to reply
and address them.

On Fri, Aug 22, 2014 at 01:52:57PM +0100, David Vrabel wrote:
> On 22/08/14 12:20, Arianna Avanzini wrote:
> > This commit introduces in xen-blkfront actual support for multiple
> > hardware queues. The number of available hardware queues is gathered
> > from the backend via XenStore; in case the expected XenStore key
> > is not available, the frontend defaults to a single I/O ring.
> 
> Can you split this into a part that reactors blkfront handle multiple
> queues and the part that adds the XenStore negotiation for this?
> 

Of course, thank you for the suggestion.

> You will also need to to add documentation for the XenStore keys to the
> blkif.h header in Xen.
> 

Thank you for pointing that out. I'll add the documentation when/if I'll
drop the RFC tag, if it's OK (I'll need to send a separate patch to
xen-devel, I think).


> David

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