From: Wei Liu <wei.liu2@citrix.com>
To: Zoltan Kiss <zoltan.kiss@citrix.com>
Cc: <ian.campbell@citrix.com>, <wei.liu2@citrix.com>,
<xen-devel@lists.xenproject.org>, <netdev@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, <jonathan.davies@citrix.com>
Subject: Re: [PATCH net-next RFC 3/5] xen-netback: Remove old TX grant copy definitons
Date: Wed, 30 Oct 2013 11:13:18 +0000 [thread overview]
Message-ID: <20131030111318.GO5221@zion.uk.xensource.com> (raw)
In-Reply-To: <1383094220-14775-4-git-send-email-zoltan.kiss@citrix.com>
On Wed, Oct 30, 2013 at 12:50:18AM +0000, Zoltan Kiss wrote:
> These became obsolate with grant mapping.
>
I'm afraid not.
This TX coalescing mechanism is designed to handle the situation where
guest's MAX_SKB_FRAGS > host's MAX_SKB_FRAGS.
To a further extent, I think you might need to add mechanism for backend
to tell frontend how many frags it can handle, and frontend needs to do
necessary coalescing. Until then you can safely use this new mapping
scheme.
Wei.
next prev parent reply other threads:[~2013-10-30 11:13 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-30 0:50 [PATCH net-next RFC 0/5] xen-netback: TX grant mapping instead of copy Zoltan Kiss
2013-10-30 0:50 ` [PATCH net-next RFC 1/5] xen-netback: Introduce TX grant map definitions Zoltan Kiss
2013-10-30 9:28 ` [Xen-devel] " Jan Beulich
2013-10-31 19:22 ` Zoltan Kiss
2013-10-31 19:33 ` Zoltan Kiss
2013-10-30 0:50 ` [PATCH net-next RFC 2/5] xen-netback: Change TX path from grant copy to mapping Zoltan Kiss
2013-10-30 9:11 ` [Xen-devel] " Paul Durrant
2013-10-30 21:10 ` Zoltan Kiss
2013-11-01 16:09 ` Zoltan Kiss
2013-10-30 0:50 ` [PATCH net-next RFC 3/5] xen-netback: Remove old TX grant copy definitons Zoltan Kiss
2013-10-30 9:39 ` [Xen-devel] " Jan Beulich
2013-10-31 19:46 ` Zoltan Kiss
2013-10-30 11:13 ` Wei Liu [this message]
2013-10-30 0:50 ` [PATCH net-next RFC 4/5] xen-netback: Fix indentations Zoltan Kiss
2013-10-30 11:13 ` Wei Liu
2013-10-31 19:48 ` Zoltan Kiss
2013-10-30 0:50 ` [PATCH net-next RFC 4/5] xen-netback: Change RX path for mapped SKB fragments Zoltan Kiss
2013-10-30 19:16 ` [Xen-devel] [PATCH net-next RFC 0/5] xen-netback: TX grant mapping instead of copy Konrad Rzeszutek Wilk
2013-10-30 19:17 ` Konrad Rzeszutek Wilk
2013-10-30 21:14 ` Zoltan Kiss
2013-11-01 10:50 ` Ian Campbell
2013-11-01 19:00 ` Zoltan Kiss
2013-11-05 17:01 ` Zoltan Kiss
2013-11-07 10:52 ` Ian Campbell
2013-11-28 17:37 ` Zoltan Kiss
2013-11-28 17:43 ` Ian Campbell
2013-12-12 22:08 ` Zoltan Kiss
2013-12-16 10:14 ` Ian Campbell
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