Hm, how are we going to have the RSS stuff work at the same time as the hardware flow steering stuff you're prototyping?
-adrian On 19 November 2014 11:02, Hans Petter Selasky <h...@selasky.org> wrote: > Hi, > > The M_FLOWID flag is marked as deprecated in the FreeBSD kernel code and the > patch below completely removes it. I suggest we will now be using the > "m_pkthdr.rsstype" also known as "M_HASHTYPE" to decide if the flowid value > is valid or not. When the "rsstype" is set to "M_HASHTYPE_NONE" the > "m_pkthdr.flowid" field is not valid. Else this field contains valid data > for both TX and RX direction. > > Background: > =========== > > The network drivers today use the "rsstype" field only when receiving > traffic. After my patch it is also used when sending traffic, and probably > we should rename it. > > The reason for using the rsstype field for transmit, is to avoid introducing > another field in the MBUF's packet header in order to steer outgoing traffic > into special multiple purpose hardware FIFOs. This new feature should > coexist with the existing flowid mechanism, and this is achieved by > introducing a new hash type which I've named "M_HASHTYPE_HWRING" in my > patch. This type can be selected by upper layers when generating traffic for > lower layers, to indicate that the traffic is of a special kind and should > have special treatment by the hardware, like rate-limiting. Hardware which > doesn't support M_HASHTYPE_HWRING will send out the packets like usual. > > > Patch is available from here: > ============================= > http://home.selasky.org:8192/m_flowid_removal.diff > > > Comments are appreciated! > > > --HPS _______________________________________________ firstname.lastname@example.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"