Re: Deadlocking in the transport

Martin Thomson <martin.thomson@gmail.com> Wed, 10 January 2018 22:42 UTC

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From: Martin Thomson <martin.thomson@gmail.com>
Date: Thu, 11 Jan 2018 09:42:23 +1100
Message-ID: <CABkgnnWtmprf291pBgTOrfi6yU9tXSfKi5J5uQpm7Z4JHuiGWg@mail.gmail.com>
Subject: Re: Deadlocking in the transport
To: Jana Iyengar <jri@google.com>
Cc: "Charles 'Buck' Krasic" <ckrasic@google.com>, QUIC WG <quic@ietf.org>
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On Thu, Jan 11, 2018 at 9:39 AM, Jana Iyengar <jri@google.com> wrote:
> Yes, I think there's easy misinterpretation here -- something I realized
> today as I've had conversations about this. What I meant was specifically at
> the API between the app and the transport, at the sender. This is basically
> saying that to avoid deadlock due to dependencies across streams, the
> transport write API must allow the app to express strict priorities.

Ahh, excellent, then I think at least we two are in agreement.  It
seems like there is an emerging acceptance of the problem and proposed
approach, I guess we might start considering how to address it.

I think that this needs to be in the main spec.  Failing to document
this sort of pitfall could be fatal.  Does anyone disagree?