On Tue, Dec 14, 2010 at 07:07:27PM -0800, Stephen Hemminger wrote:
> On Wed, 15 Dec 2010 02:24:08 +0100 (CET)
> Michał Mirosław <[email protected]> wrote:
> > Some drivers are using skb_transport_offset(skb) instead of skb->csum_start
> > for NETIF_F_HW_CSUM offload. This does not matter now, but if someone
> > implements checksumming of encapsulated packets then this will break
> > silently.
> >
> > TSO output paths are left as they are, since they are for IP+TCP only
> > (might be worth converting though).
> >
> > Signed-off-by: Michał Mirosław <[email protected]>
> Which if any of these drivers did you test on real hardware?
I'm running it on skge, with additional patch that changes it to use
NETIF_F_HW_CSUM instead of NETIF_F_IP_CSUM. BTW, why it is not advertising
full HW checksum in vanilla kernel? Are there any known hardware bugs in there?
Best Regards,
Michał Mirosław
---
lspci:
02:05.0 Ethernet controller: 3Com Corporation 3c940 10/100/1000Base-T [Marvell]
(rev 12)
Subsystem: ASUSTeK Computer Inc. A7V600/P4P800/K8V motherboard
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr-
Stepping- SERR+ FastB2B- DisINTx-
Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 64 (5750ns min, 7750ns max), Cache Line Size: 16 bytes
Interrupt: pin A routed to IRQ 22
Region 0: Memory at feafc000 (32-bit, non-prefetchable) [size=16K]
Region 1: I/O ports at d800 [size=256]
Capabilities: <access denied>
Kernel driver in use: skge
Kernel modules: skge
ethtool -k:
Offload parameters for eth3:
rx-checksumming: on
tx-checksumming: on
scatter-gather: on
tcp segmentation offload: off
udp fragmentation offload: off
generic segmentation offload: on
large receive offload: off
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