netdev - Re: Linux ECN Handling

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CADVnQymO+sjGO4T0Bu-eyJbyPKuND0sO-nNyzRAqJ9uoznNRTg@mail.gmail.com>
Date:   Tue, 21 Nov 2017 11:20:16 -0500
From:   Neal Cardwell <ncardwell@...gle.com>
To:     Yuchung Cheng <ycheng@...gle.com>
Cc:     Steve Ibanez <sibanez@...nford.edu>,
        Daniel Borkmann <daniel@...earbox.net>,
        Netdev <netdev@...r.kernel.org>, Florian Westphal <fw@...len.de>,
        Mohammad Alizadeh <alizadeh@...il.mit.edu>,
        Lawrence Brakmo <brakmo@...com>,
        Eric Dumazet <edumazet@...gle.com>
Subject: Re: Linux ECN Handling

On Tue, Nov 21, 2017 at 10:51 AM, Yuchung Cheng <ycheng@...gle.com> wrote:
> On Tue, Nov 21, 2017 at 7:01 AM, Neal Cardwell <ncardwell@...gle.com> wrote:
>>
>> The original motivation for only allowing TLP in the CA_Open state was
>> to be conservative and avoid having the TLP impose extra load on the
>> bottleneck when it may be congested. Plus if there are any SACKed
>> packets in the SACK scoreboard then there are other existing
>> mechanisms to do speedy loss recovery.
> Neal I like your idea of covering more states in TLP. but shouldn't we
> also fix the tso_deferral_logic to work better w/ PRR in CWR state, b/c
> it's a general transmission issue.

Yes, I agree it's also worthwhile to see if we can make PRR and TSO
deferral play well together. Sorry, I should have been more clear
about that.

neal