Date: Fri, 22 Sep 2017 11:03:14 +0800 From: Sepherosa Ziehau <sepherosa@gmail.com> To: "Robert N. M. Watson" <rwatson@freebsd.org> Cc: Adrian Chadd <adrian@freebsd.org>, "freebsd-net@freebsd.org" <freebsd-net@freebsd.org> Subject: Re: RSS_UDP_IPV4_EX? Message-ID: <CAMOc5cyJ9N%2BdTEXJOd_AE438S2Lb4rJeZ5d%2BDv2fucfBLfkiQg@mail.gmail.com> In-Reply-To: <E43C698C-98D8-41DC-A97A-442FE31415E5@FreeBSD.org> References: <CAMOc5cwL_Z15p3334jJ1SBtC3rP1Vn%2BtP_sFzSBeaMG1AK7sZA@mail.gmail.com> <CAJ-Vmok5JePWFc-y9YhnjKptuw49wy-dw2kj_8Mk1Jnfb=VG7g@mail.gmail.com> <E43C698C-98D8-41DC-A97A-442FE31415E5@FreeBSD.org>
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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 <rwatson@freebsd.org> 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 <adrian@freebsd.org> 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 <sepherosa@gmail.com> wrote: >> >> IPv4 UDP with extended headers o_O? Or it was just a mistake. >> >> Thanks, >> sephe >> >> -- >> Tomorrow Will Never Die > > > -- Tomorrow Will Never Die
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