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

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Message-ID: <1365520207.17014.1.camel@zakaz.uk.xensource.com>
Date:	Tue, 9 Apr 2013 16:10:07 +0100
From:	Ian Campbell <Ian.Campbell@...rix.com>
To:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
CC:	Wei Liu <wei.liu2@...rix.com>,
	"xen-devel@...ts.xen.org" <xen-devel@...ts.xen.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"annie.li@...cle.com" <annie.li@...cle.com>,
	David Vrabel <david.vrabel@...rix.com>
Subject: Re: [Xen-devel] [PATCH 5/6] xen-netback: coalesce slots before
 copying

On Mon, 2013-03-25 at 16:57 +0000, Konrad Rzeszutek Wilk wrote:
> On Mon, Mar 25, 2013 at 11:08:21AM +0000, Wei Liu wrote:
> > 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.
> >
> 
> This should probably also CC stable@...r.kernel.org

DaveM prefers net patches to not do so and he takes care of forwarding
patches once he is happy (i.e. after they've been in his/Linus' tree for
a bit).

Ian

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