From: Daniel Borkmann <daniel@iogearbox.net>
To: Derek Ditch <derek.ditch@gmail.com>
Cc: netdev@vger.kernel.org, tom@herbertland.com, jiri@resnulli.us,
willemb@google.com, eric@regit.org
Subject: Re: [Bug 120441] af_packet no longer uses symmetric hashing
Date: Thu, 16 Jun 2016 16:37:52 +0200 [thread overview]
Message-ID: <5762B9C0.9010902@iogearbox.net> (raw)
In-Reply-To: <511F6A17-BD35-4846-A717-1463B74D7F2A@gmail.com>
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 <eric@regit.org> ---
>> 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 <eric@regit.org> changed:
>>
>> What |Removed |Added
>> ----------------------------------------------------------------------------
>> CC| |eric@regit.org
>>
>> --- Comment #1 from Eric Leblond <eric@regit.org> ---
>> 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 where the symetrical jhash_3words function has been replaced by jhash2.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.
>
>
next parent reply other threads:[~2016-06-16 14:37 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <511F6A17-BD35-4846-A717-1463B74D7F2A@gmail.com>
2016-06-16 14:37 ` Daniel Borkmann [this message]
2016-06-16 14:40 ` [Bug 120441] af_packet no longer uses symmetric hashing Derek Ditch
2016-06-16 14:50 ` Hannes Frederic Sowa
2016-06-16 15:18 ` Daniel Borkmann
2016-06-16 15:32 ` Willem de Bruijn
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=5762B9C0.9010902@iogearbox.net \
--to=daniel@iogearbox.net \
--cc=derek.ditch@gmail.com \
--cc=eric@regit.org \
--cc=jiri@resnulli.us \
--cc=netdev@vger.kernel.org \
--cc=tom@herbertland.com \
--cc=willemb@google.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).