git: hammer2 - optimize hammer2_pfs_memory_wakeup()

[Matthew Dillon]

commit 2118d74174f77861ae3959d7dc43a0fcf6dd9cbf
Author: Matthew Dillon <dillon at apollo.backplane.com>
Date:   Sat Dec 2 11:05:58 2017 -0800

    hammer2 - optimize hammer2_pfs_memory_wakeup()
    
    * Optimize hammer2_pfs_memory_wakeup() to use fetchadd instead of
      cmpset, reducing contention.

Summary of changes:
 sys/vfs/hammer2/hammer2_vfsops.c | 21 +++++++--------------
 1 file changed, 7 insertions(+), 14 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/2118d74174f77861ae3959d7dc43a0fcf6dd9cbf


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