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Re: [Qemu-devel] [PATCH v2] e1000: NetClientInfo.receive_iov implemented
From: |
Stefan Hajnoczi |
Subject: |
Re: [Qemu-devel] [PATCH v2] e1000: NetClientInfo.receive_iov implemented |
Date: |
Wed, 11 Sep 2013 10:39:17 +0200 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Tue, Sep 10, 2013 at 02:19:47PM +0200, Vincenzo Maffione wrote:
> This patch implements the NetClientInfo.receive_iov method for the
> e1000 device emulation. In this way a network backend that uses
> qemu_sendv_packet() can deliver the fragmented packet without
> requiring an additional copy in the frontend/backend network code
> (nc_sendv_compat() function).
>
> The existing method NetClientInfo.receive has been reimplemented
> using the new method.
>
> Signed-off-by: Vincenzo Maffione <address@hidden>
> ---
> hw/net/e1000.c | 71
> ++++++++++++++++++++++++++++++++++++++++++++++++----------
> 1 file changed, 59 insertions(+), 12 deletions(-)
>
> I propose this patch also because our research group (University of Pisa,
> Department of Computer Engineering) is working on the e1000 device
> (optimizations and paravirtual extensions) and we have patches to
> support the VALE switch as a network backend (see
> http://info.iet.unipi.it/~luigi/vale/).
> The VALE backend uses qemu_sendv_packet() to send fragmented packets: For
> this reason we think it could be interesting to better support these packets
> with e1000.
Thanks, applied to my net tree:
https://github.com/stefanha/qemu/commits/net
Stefan