git: kernel - Fix mbuf cluster statistics, fix type change bug

[Matthew Dillon <dillon@xxxxxxxxxxxxxxxxxxxxxxx>]

commit 461213b7b36154b1d0b6af709fd49954233622d6
Author: Matthew Dillon <dillon@apollo.backplane.com>
Date:   Mon Oct 31 14:18:52 2011 -0700

    kernel - Fix mbuf cluster statistics, fix type change bug
    
    * The mbuf cluster statistics were not properly handling a sharecount race case,
      causing the cluster count to continuously increase under heavy loads.
    
    * atomic_set_short() was being improperly used to set m->m_type, causing the type field
      to collect a logical OR of changeouts.  Just set it normally.
    
    * We don't need to use atomic ops for per-cpu stats updates.
    
    Reported-by: Peter Avalos <peter@theshell.com>, "Samuel J. Greear" <sjg@evilcode.net>

Summary of changes:
 sys/kern/uipc_mbuf.c |   63 +++++++++++++++++++++----------------------------
 1 files changed, 27 insertions(+), 36 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/461213b7b36154b1d0b6af709fd49954233622d6


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