On 01.12.2012 10:48, Jack Vogel wrote:
On Sat, Dec 1, 2012 at 12:40 AM, Andre Oppermann <an...@freebsd.org <mailto:an...@freebsd.org>> wrote: On 30.11.2012 23:19, Jack F Vogel wrote: Author: jfv Date: Fri Nov 30 22:19:18 2012 New Revision: 243714 URL: http://svnweb.freebsd.org/__changeset/base/243714 <http://svnweb.freebsd.org/changeset/base/243714> Log: First of a series of 11 patches leading to new ixgbe version 2.5.0 This removes the header split and supporting code from the driver. You did this because the datasheet says the header split feature is not supported and using it gives unpredictable results? I'm not sure what the datasheet says, but yes there is a hardware issue on some of the 10G adapters if using header split. I have left the code in in a disabled state for a long time, thinking it would be there as example code, but I think it best to remove it and simplify the code at this point.
It says so in section 7.1.10 Header Splitting: Note: Header Splitting mode might cause unpredictable behavior and should not be used with the 82599. For more information, see the product specification update errata on this subject.
Oh, and yes, results have always been mixed with the feature in my experience anyway.
I can imagine. Considering how we work with the packet through the stack and in the socket buffers there isn't much benefit from header splitting. -- Andre _______________________________________________ svn-src-head@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
