netdev - Re: [PATCH 5/6] xen-netback: coalesce slots before copying

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Date:	Mon, 25 Mar 2013 12:20:50 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	wei.liu2@...rix.com
Cc:	xen-devel@...ts.xen.org, netdev@...r.kernel.org,
	ian.campbell@...rix.com, annie.li@...cle.com,
	konrad.wilk@...cle.com, david.vrabel@...rix.com
Subject: Re: [PATCH 5/6] xen-netback: coalesce slots before copying

From: Wei Liu <wei.liu2@...rix.com>
Date: Mon, 25 Mar 2013 11:08:21 +0000

> This patch tries to coalesce tx requests when constructing grant copy
> structures. It enables netback to deal with situation when frontend's
> MAX_SKB_FRAGS is larger than backend's MAX_SKB_FRAGS.
> 
> It defines max_skb_slots, which is a estimation of the maximum number of slots
> a guest can send, anything bigger than that is considered malicious. Now it is
> set to 20, which should be enough to accommodate Linux (16 to 19).
> 
> Also change variable name from "frags" to "slots" in netbk_count_requests.
> 
> Signed-off-by: Wei Liu <wei.liu2@...rix.com>

Please resubmit after you've incorporated the feedback you've
received.
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