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From: "Roger Pau Monné" <roger.pau@citrix.com>
To: Bob Liu <bob.liu@oracle.com>, <xen-devel@lists.xen.org>
Cc: <david.vrabel@citrix.com>, <linux-kernel@vger.kernel.org>,
	<konrad.wilk@oracle.com>, <boris.ostrovsky@oracle.com>,
	<wei.liu2@citrix.com>
Subject: Re: [PATCH 2/2] drivers: xen/block: add multi-page ring support
Date: Mon, 2 Feb 2015 10:43:23 +0000	[thread overview]
Message-ID: <54CF54CB.70008@citrix.com> (raw)
In-Reply-To: <1422008071-27643-2-git-send-email-bob.liu@oracle.com>

El 23/01/15 a les 10.14, Bob Liu ha escrit:
> Extend xen/block to support multi-page ring.
>  * xen-blkback notify blkfront with feature-multi-ring-pages
>  * xen-blkfront write to xenstore about how many pages are used as the ring
> 
> If using 4 pages as the ring, inflight requests inscreased from 32 to 128 and
> IOPS improved nearly 400% on our system.
> 
> Signed-off-by: Bob Liu <bob.liu@oracle.com>
> ---
>  drivers/block/xen-blkback/xenbus.c |   86 +++++++++++++++++++++++++--------
>  drivers/block/xen-blkfront.c       |   94 ++++++++++++++++++++++++++----------

This requires a patch to xen/include/public/io/blkif.h in the Xen
repository describing how this protocol extension is going to work
before reviewing the Linux implementation.

Roger.


  reply	other threads:[~2015-02-02 10:43 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-01-23 10:14 [PATCH 1/2] xenbus_client: extend interface to suppurt multi-page ring Bob Liu
2015-01-23 10:14 ` [PATCH 2/2] drivers: xen/block: add multi-page ring support Bob Liu
2015-02-02 10:43   ` Roger Pau Monné [this message]
2015-02-06 10:47     ` Bob Liu
2015-02-06 11:01       ` Wei Liu
2015-02-06 12:52         ` Bob Liu
2015-02-05 17:41   ` [Xen-devel] " Felipe Franciosi
2015-02-06 10:43     ` Bob Liu
2015-02-06 10:57 ` [PATCH 1/2] xenbus_client: extend interface to suppurt multi-page ring Wei Liu

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