From owner-freebsd-net@freebsd.org Fri Sep 22 03:03:16 2017 Return-Path: Delivered-To: freebsd-net@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 1904EE0D569 for ; Fri, 22 Sep 2017 03:03:16 +0000 (UTC) (envelope-from sepherosa@gmail.com) Received: from mail-qt0-x230.google.com (mail-qt0-x230.google.com [IPv6:2607:f8b0:400d:c0d::230]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id C92CC76A5B; Fri, 22 Sep 2017 03:03:15 +0000 (UTC) (envelope-from sepherosa@gmail.com) Received: by mail-qt0-x230.google.com with SMTP id i50so7847992qtf.0; Thu, 21 Sep 2017 20:03:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=Y0Ja6SCQ+ph06lfuIjIjuk2ixKyCPLtKL6KwEZCxAQ4=; b=TzWgNsUXGHPDAt+YA/EbpB+KlAenSKN+4vw68xqK1k/Eg2/uxyI4kU9jMRAp/qsA7V V7O6znZP453daVI9GKY5hTCQeYDGKTOZe4aIc9kLRzA5oMlamlAjjQkHyiD5Wl0dSVSM V2j9K92Rvwk48lP0a+rmWBufYZaL+cc7XYC5ld62O5kbMxZv/ufPx2tnI6rDDCDri1Kw 0Z/OsymTQdljkbJeAkwhQ2ZovMUkYt3HdJpLB2sjgP7BXGEfvuBlFyiBCH899VvitLyR Hc5bL2r+e8nOnRw53tTTRjonjVj4C/bNlEUN+dJeK4nzel8otkW/fNJ9UXYkmDJP5noY jcAQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=Y0Ja6SCQ+ph06lfuIjIjuk2ixKyCPLtKL6KwEZCxAQ4=; b=nnttk+YMe/mY+mMy7Kc3MZhDw0nDJ6BTogic3kHUXzGMPnfVSe5n7+qQ7UYZChdMeV BES7NJhred7J2t8BmXMGBZpi0sn6ISxBctxB0JDmo9j0lB/fMlzCanNIAYwY3XoT8Zfn zwgUiP9iFWe9LmSjclfG4iOVu5CBMTIgRGAvwPKZbmkVfn3OLoBoPCByU/V3sIXizltm tVgL3NeNGYDNTlGDt5LMoIKG1NgVzdTK+zkKptWitxYz+VA5B1LswpALFIsDai+K0F3o hJRihjICvCQa9ZscvB9At2cq436ZZnHs24CN2PFIqwuijxj9xANqo38cJt0obqKHgX7p V1Hg== X-Gm-Message-State: AHPjjUghtpGSRO0TlWWjJuItHK1QFe3erIIBzCEKi2E+wHRXenNZ/vT9 gz4kQ4CmdOnyzhSEpyA1fQTCxZ/6/WBczVe+pw== X-Google-Smtp-Source: AOwi7QB5GWhbMwmSj24TDraPwN/vLM3q03vZRmHApvb0EeUbrz1Cmtvoe6SM+JRuRSB6seTct2BrGozSz+h+3hjuYV4= X-Received: by 10.200.15.132 with SMTP id b4mr6754358qtk.127.1506049394887; Thu, 21 Sep 2017 20:03:14 -0700 (PDT) MIME-Version: 1.0 Received: by 10.140.21.20 with HTTP; Thu, 21 Sep 2017 20:03:14 -0700 (PDT) In-Reply-To: References: From: Sepherosa Ziehau Date: Fri, 22 Sep 2017 11:03:14 +0800 Message-ID: Subject: Re: RSS_UDP_IPV4_EX? To: "Robert N. M. Watson" Cc: Adrian Chadd , "freebsd-net@freebsd.org" Content-Type: text/plain; charset="UTF-8" X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 22 Sep 2017 03:03:16 -0000 I found the source of the IPV4_EX. I think it's from e1000 82575 header, which contains IPv4_EX. However, it's not related to extension header, it means IPv4 header w/ IP options; while RSS never takes any bits from IP optons. And these macros in e1000 82575 header are actually _not_ RSS related. On Sat, Sep 2, 2017 at 6:11 PM, Robert N. M. Watson wrote: > My recollection here is (quite) hazy, as it's been a while, but it's likely > that this was a transcription error. The set of hash types was largely > modelled on what Chelsio offered in the T3 (if I recall), and also what was > documented in the Microsoft RSS white paper, so it may be worth taking a > look at those sources to see if something makes itself obvious. > > (There do seem to be some odd variations in hashing types supported by > various NICs -- e.g., hashing but with different hash algorithms in certain > generations of cards, etc, so it also wouldn't surprise me if it did > correspond to something real. Clearly the comment is not good enough to > explain that, if so!) > > Robert > > On 2 Sep 2017, at 00:43, Adrian Chadd wrote: > > Hi, > > I seem to recall it was something some chipsets supported? I forget the > details. > > > > -adrian > > > On 30 August 2017 at 00:07, Sepherosa Ziehau wrote: >> >> IPv4 UDP with extended headers o_O? Or it was just a mistake. >> >> Thanks, >> sephe >> >> -- >> Tomorrow Will Never Die > > > -- Tomorrow Will Never Die