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From: Max Laier <mlaier@FreeBSD.org>
Date: Wed, 1 Sep 2010 19:50:03 +0000 (UTC)
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Subject: cvs commit: src/share/man/man9 Makefile locking.9 rmlock.9
 src/sys/kern kern_rmlock.c src/sys/sys _rmlock.h rmlock.h
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mlaier      2010-09-01 19:50:03 UTC

  FreeBSD src repository

  Modified files:
    share/man/man9       Makefile locking.9 rmlock.9 
    sys/kern             kern_rmlock.c 
    sys/sys              _rmlock.h rmlock.h 
  Log:
  SVN rev 212112 on 2010-09-01 19:50:03Z by mlaier
  
  rmlock(9) two additions and one change/fix:
   - add rm_try_rlock().
   - add RM_SLEEPABLE to use sx(9) as the back-end lock in order to sleep while
     holding the write lock.
   - change rm_noreadtoken to a cpu bitmask to indicate which CPUs need to go
     through the lock/unlock in order to synchronize.  As a side effect, this
     also avoids IPI to CPUs without any readers during rm_wlock.
  
  Discussed with:         ups@, rwatson@ on arch@
  Sponsored by:           Isilon Systems, Inc.
  
  Revision  Changes    Path
  1.373     +1 -0      src/share/man/man9/Makefile
  1.22      +8 -1      src/share/man/man9/locking.9
  1.6       +28 -2     src/share/man/man9/rmlock.9
  1.12      +90 -37    src/sys/kern/kern_rmlock.c
  1.2       +7 -3      src/sys/sys/_rmlock.h
  1.5       +14 -8     src/sys/sys/rmlock.h