cvs commit: src/sys/netinet tcp_input.c

[Robert Watson]

rwatson     2004-12-25 22:23:13 UTC

  FreeBSD src repository

  Modified files:
    sys/netinet          tcp_input.c 
  Log:
  Revert parts of tcp_input.c:1.255 associated with the header predicted
  cases for tcp_input():
  
  While it is true that the pcbinfo lock provides a pseudo-reference to
  inpcbs, both the inpcb and pcbinfo locks are required to free an
  un-referenced inpcb.  As such, we can release the pcbinfo lock as
  long as the inpcb remains locked with the confidence that it will not
  be garbage-collected.  This leads to a less conservative locking
  strategy that should reduce contention on the TCP pcbinfo lock.
  
  Discussed with: sam
  
  Revision  Changes    Path
  1.262     +7 -2      src/sys/netinet/tcp_input.c