Messages in this thread | | | Date | Thu, 11 Jan 2001 11:41:30 +0100 (CET) | From | Ingo Molnar <> | Subject | Re: Updated zerocopy patch up on kernel.org |
| |
On Tue, 9 Jan 2001, David S. Miller wrote:
> Is there any value to supporting fragments in a driver which > doesn't do hardware checksumming? IIRC Alexey had a patch to do > such for Tulip, but I don't see it in the above patchset. > > I'm actually considering making the SG w/o hwcsum situation illegal.
i believe it might still make some limited sense for normal sendmsg() and higher MTUs (or 8k NFS) - we could copy & checksum stuff into the ->tcp_page if SG is possible and thus the SG capability improves the VM. (because we can allocate at PAGE_SIZE granularity.)
Ingo
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
| |