Messages in this thread | | | Date | Thu, 03 Apr 2003 15:47:25 -0500 | From | Jeff Garzik <> | Subject | Re: Deactivating TCP checksumming |
| |
Dennis Cook wrote: > Based on various feedback, on my RH Linux 2.4.18 kernel I tried the > following: > > Set "features" bit NETIF_F_IP_CSUM set (the only feature bit set). > In my network driver start-transmit check for "CHECKSUM_HW" in ip_summed. > Using a small test program, use "sendfile" to copy a file to a network > socket FD. > Result is none of the packets presented to my network adapter driver have > ip_summed set to CHECKSUM_HW, so the SW IP stack has already > computed checksums.
CHECKSUM_HW is for receive, not transmit. Read the comments at the top of include/linux/skbuff.h.
> Is this mechanism possibly broken on kernel 2.4?
it works quite well.
Jeff
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |