cvs commit: src/sys/dev/fxp if_fxp.c

[Robert Watson]

rwatson     2004/01/17 15:04:26 PST

  FreeBSD src repository

  Modified files:        (Branch: RELENG_4)
    sys/dev/fxp          if_fxp.c 
  Log:
  MFC 1.179:
  
    date: 2003/05/16 01:13:16;  author: rwatson;  state: Exp;  lines: +5 -1
    Add a tunable/sysctl "hw.fxp_noflow" which disables flow control support
    on if_fxp cards.  When flow control is enabled, if the operating system
    doesn't acknowledge the packet buffer filling, the card will begin to
    generate ethernet quench packets, but appears to get into a feedback
    loop of some sort, hosing local switches.  This is a temporary workaround
    for 5.1: the ability to configure flow control should probably be
    exposed by some or another management interface on ethernet link layer
    devices.
  
  Requested by:   Pawel Malachowski <pawmal-posting at freebsd.lublin.pl>
  
  Revision    Changes    Path
  1.110.2.32  +5 -1      src/sys/dev/fxp/if_fxp.c