cvs commit: src/sys/conf options src/sys/kern kern_mbuf.c src/sys/net if.c if.h if_ethersubr.c if_var.h if_vlan.c if_vlan_var.h src/sys/sys mbuf.h

[Gleb Smirnoff]

glebius     2006-01-30 13:45:15 UTC

  FreeBSD src repository

  Modified files:
    sys/conf             options 
    sys/kern             kern_mbuf.c 
    sys/net              if.c if.h if_ethersubr.c if_var.h 
                         if_vlan.c if_vlan_var.h 
    sys/sys              mbuf.h 
  Log:
  Merge the //depot/user/yar/vlan branch into CVS. It contains some collective
  work by yar, thompsa and myself. The checksum offloading part also involves
  work done by Mihail Balikov.
  
  The most important changes:
  
  o   Instead of global linked list of all vlan softc use a per-trunk
    hash. The size of hash is dynamically adjusted, depending on
    number of entries. This changes struct ifnet, replacing counter
    of vlans with a pointer to trunk structure. This change is an
    improvement for setups with big number of VLANs, several interfaces
    and several CPUs. It is a small regression for a setup with a single
    VLAN interface.
      An alternative to dynamic hash is a per-trunk static array with
    4096 entries, which is a compile time option - VLAN_ARRAY. In my
    experiments the array is not an improvement, probably because such
    a big trunk structure doesn't fit into CPU cache.
  o   Introduce an UMA zone for VLAN tags. Since drivers depend on it,
    the zone is declared in kern_mbuf.c, not in optional vlan(4) driver.
    This change is a big improvement for any setup utilizing vlan(4).
  o   Use rwlock(9) instead of mutex(9) for locking. We are the first
    ones to do this! :)
  o   Some drivers can do hardware VLAN tagging + hardware checksum
    offloading. Add an infrastructure for this. Whenever vlan(4) is
    attached to a parent or parent configuration is changed, the flags
    on vlan(4) interface are updated.
  
  In collaboration with:  yar, thompsa
  In collaboration with:  Mihail Balikov <mihail.balikov interbgc.com>
  
  Revision  Changes    Path
  1.526     +2 -0      src/sys/conf/options
  1.19      +25 -0     src/sys/kern/kern_mbuf.c
  1.253     +2 -1      src/sys/net/if.c
  1.100     +1 -0      src/sys/net/if.h
  1.213     +3 -3      src/sys/net/if_ethersubr.c
  1.106     +2 -1      src/sys/net/if_var.h
  1.94      +462 -119  src/sys/net/if_vlan.c
  1.24      +9 -5      src/sys/net/if_vlan_var.h
  1.187     +5 -0      src/sys/sys/mbuf.h