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Date: Tue, 13 Nov 2012 20:24:01 -0500 From: Vlad Yasevich <vyasevic@...hat.com> To: netdev@...r.kernel.org Cc: eric.dumazet@...il.com, davem@...emloft.com Subject: [RFC PATCH 00/13] Always build GSO/GRO functionality into the kernel This patch series is a revision suggested by Eric to solve the problem where a host without IPv6 support drops GSO frames from the guest. The problem is that GSO/GRO support is per protocol, and when said protocol is not loaded or is disabled, packets attempting to go through GSO/GRO code paths are dropped. This causes retransmissions and a two orders of magnitude drop in performance. Prior attempt to solve the problem simply enabled enough GSO/GRO functionality for IPv6 protocol when IPv6 was diabled. This did not solve the problem when the protocol was not build in or was blacklisted. To solve the problem, it was suggested that we separate GSO/GRO callback registration from packet processing registrations. That way GSO/GRO callbacks can be built into the kernel and always be there. This patch series attempts to do just that. * Patches 1 and 2 split the GSO/GRO handlers from packet_type and convert to the new structure. * Patches 3, 4 and 5 do the same thing for net_protocol structure. * The rest of the patches try to incrementally move the IPv6 GSO/GRO code out of the module and into the static kernel build. Some IPv6 helper functions also had to move as well. I am currently testing the patches, but if folks could look this over and send me any comments, I'd appreciate it. Thanks -vlad Vlad Yasevich (13): net: Add generic packet offload infrastructure. net: Switch to using the new packet offload infrustructure net: Add net protocol offload registration infrustructure ipv6: Add new offload registration infrastructure. ipv4: Switch to using the new offload infrastructure. ipv6: Switch to using new offload infrastructure. ipv6: Separate ipv6 offload support ipv6: Separate tcp offload functionality ipv6: Separate out UDP offload functionality ipv6: Move exthdr offload support into separate file ipv6: Update ipv6 static library with newly needed functions ipv4: Pull GSO registration out of inet_init() ipv6: Pull IPv6 GSO registration out of the module include/linux/netdevice.h | 15 ++- include/net/ip6_checksum.h | 33 +++++ include/net/protocol.h | 35 +++--- net/core/dev.c | 93 ++++++++++++++- net/ipv4/af_inet.c | 53 ++++++--- net/ipv4/protocol.c | 22 ++++- net/ipv6/Makefile | 7 +- net/ipv6/af_inet6.c | 240 ------------------------------------- net/ipv6/exthdrs.c | 8 +- net/ipv6/exthdrs_offload.c | 41 +++++++ net/ipv6/ip6_offload.c | 280 ++++++++++++++++++++++++++++++++++++++++++++ net/ipv6/ip6_offload.h | 18 +++ net/ipv6/ip6_output.c | 65 ---------- net/ipv6/output_core.c | 76 ++++++++++++ net/ipv6/protocol.c | 21 ++++ net/ipv6/tcp_ipv6.c | 107 +----------------- net/ipv6/tcpv6_offload.c | 93 +++++++++++++++ net/ipv6/udp.c | 94 --------------- net/ipv6/udp_offload.c | 117 ++++++++++++++++++ 19 files changed, 867 insertions(+), 551 deletions(-) create mode 100644 net/ipv6/exthdrs_offload.c create mode 100644 net/ipv6/ip6_offload.c create mode 100644 net/ipv6/ip6_offload.h create mode 100644 net/ipv6/output_core.c create mode 100644 net/ipv6/tcpv6_offload.c create mode 100644 net/ipv6/udp_offload.c -- 1.7.7.6 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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