From: David Vrabel <david.vrabel@citrix.com>
To: Roger Pau Monne <roger.pau@citrix.com>
Cc: <xen-devel@lists.xen.org>, <linux-kernel@vger.kernel.org>,
David Vrabel <david.vrabel@citrix.com>
Subject: Re: [Xen-devel] [PATCH 2/3] xen-blkfront: improve aproximation of required grants per request
Date: Thu, 1 Aug 2013 11:10:48 +0100 [thread overview]
Message-ID: <51FA3428.9020403@citrix.com> (raw)
In-Reply-To: <1375282844-4314-3-git-send-email-roger.pau@citrix.com>
On 31/07/13 16:00, Roger Pau Monne wrote:
> Improve the calculation of required grants to process a request by
> using nr_phys_segments instead of always assuming a request is going
> to use all posible segments.
>
> nr_phys_segments contains the number of scatter-gather DMA addr+len
> pairs, which is basically what we put at every granted page.
> for_each_sg iterates over the DMA addr+len pairs and uses a grant
> page for each of them.
Reviewed-by: David Vrabel <david.vrabel@citrix.com>
David
next prev parent reply other threads:[~2013-08-01 10:10 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-31 15:00 [PATCH 0/3] xen: fixes for gnt and block Roger Pau Monne
2013-07-31 15:00 ` [PATCH 1/3] xen-gnt: prevent adding duplicate gnt callbacks Roger Pau Monne
2013-07-31 18:33 ` Matt Wilson
2013-08-01 10:12 ` David Vrabel
2013-07-31 15:00 ` [PATCH 2/3] xen-blkfront: improve aproximation of required grants per request Roger Pau Monne
2013-08-01 10:10 ` David Vrabel [this message]
2013-07-31 15:00 ` [PATCH 3/3] xen-blkfront: revoke foreign access for grants not mapped by the backend Roger Pau Monne
2013-08-01 6:35 ` Matt Wilson
2013-08-01 10:10 ` [Xen-devel] " David Vrabel
2013-08-09 15:08 ` Konrad Rzeszutek Wilk
2013-08-12 10:58 ` Roger Pau Monné
2013-08-12 12:02 ` Konrad Rzeszutek Wilk
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