DragonFly-2.3.1.806.gb2072 master sys/kern sys_pipe.c

[Matthew Dillon]

commit b20720b5191015783c5d4c26383307807e9c4862
Author: Matthew Dillon <dillon at apollo.backplane.com>
Date:   Sun Jul 12 18:37:46 2009 -0700

    pipe - Fix piperd/pipewr deadlock in mpsafe case
    
    * Fix a bug where piperd and pipewr could be entered simultaniously
      by the reader and writer and neither gets woken up.
    
    * Redo the hysteresis slightly to reduce IPIs even more.

Summary of changes:
 sys/kern/sys_pipe.c |   66 ++++++++++++++++++++++++++++++++------------------
 1 files changed, 42 insertions(+), 24 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/b20720b5191015783c5d4c26383307807e9c4862


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