From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Borkmann Subject: Re: [Bug 120441] af_packet no longer uses symmetric hashing Date: Thu, 16 Jun 2016 16:37:52 +0200 Message-ID: <5762B9C0.9010902@iogearbox.net> References: <511F6A17-BD35-4846-A717-1463B74D7F2A@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org, tom@herbertland.com, jiri@resnulli.us, willemb@google.com, eric@regit.org To: Derek Ditch Return-path: Received: from www62.your-server.de ([213.133.104.62]:56076 "EHLO www62.your-server.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754156AbcFPOh7 (ORCPT ); Thu, 16 Jun 2016 10:37:59 -0400 In-Reply-To: <511F6A17-BD35-4846-A717-1463B74D7F2A@gmail.com> Sender: netdev-owner@vger.kernel.org List-ID: On 06/16/2016 03:57 PM, Derek Ditch wrote: [...] >> Begin forwarded message: >> >> From: bugzilla-daemon@bugzilla.kernel.org >> Subject: [Bug 120441] af_packet no longer uses symmetric hashing >> Date: June 16, 2016 at 07:35:54 -0500 >> To: derek.ditch@gmail.com >> >> https://bugzilla.kernel.org/show_bug.cgi?id=120441 Just thinking out loud, perhaps one way would be to implement your own fanout hashing via eBPF demuxer, f.e. in case CPU selection etc wouldn't work. Another option could be to have a (2nd) customizable hash demux that would enforce to always go through the flow-dissector and where you would have a socket option to control keys for it, but I presume that seems rather less desirable. >> --- Comment #2 from Eric Leblond --- >> This patch has been introduced in 4.2. >> >> -- >> You are receiving this mail because: >> You reported the bug. >> Begin forwarded message: >> >> From: bugzilla-daemon@bugzilla.kernel.org >> Subject: [Bug 120441] af_packet no longer uses symmetric hashing >> Date: June 16, 2016 at 06:59:58 -0500 >> To: derek.ditch@gmail.com >> >> https://bugzilla.kernel.org/show_bug.cgi?id=120441 >> >> Eric Leblond changed: >> >> What |Removed |Added >> ---------------------------------------------------------------------------- >> CC| |eric@regit.org >> >> --- Comment #1 from Eric Leblond --- >> It seems the problem has been introduced by >> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=42aecaa9bb2bd57eb8d61b4565cee5d3640863fb >> where the symetrical jhash_3words function has been replaced by jhash2. >> >> -- >> You are receiving this mail because: >> You reported the bug. > >