https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=203476
Bug ID: 203476
Summary: [net] [igb] not optimal checksum processing
Product: Base System
Version: 10.2-STABLE
Hardware: Any
OS: Any
Status: New
Severity: Affects Some People
Priority: ---
Component: kern
Assignee: freebsd-bugs@FreeBSD.org
Reporter: dmitry2...@yandex.ru
Created attachment 161607
--> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=161607&action=edit
Patch for if_igb.h
igb driver declare in sys/dev/e1000/if_igb.c:
ifp->if_hwassist support (CSUM_TCP|CSUM_UDP|CSUM),
but in sys/dev/e1000/if_igb.h:
#define CSUM_OFFLOAD (CSUM_IP|CSUM_TCP|CSUM_UDP|CSUM_SCTP)
this difference results = the not optimal in igb_tx_ctx_setup() in
sys/dev/e1000/if_igb.c for packets other than TCP|UDP|SCTP.
And i think not work TCP, UDP, SCTP offload for IPv6 (not check), then send
IPv6 TCP or UDP network stack sets flags CSUM_TCP_IPV6 or CSUM_UDP_IPV6, but in
if_hwassist no CSUM_TCP_IPV6|CSUM_UDP_IPV6.
Hardware support it.
http://www.intel.com/content/dam/doc/product-brief/82576-gbe-controller-brief.pdf
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