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From: Attilio Rao <attilio@FreeBSD.org>
Date: Thu, 7 Jan 2010 00:47:50 +0000 (UTC)
To: cvs-src-old@freebsd.org
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Subject: cvs commit: src/sys/kern kern_lock.c
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attilio     2010-01-07 00:47:50 UTC

  FreeBSD src repository

  Modified files:
    sys/kern             kern_lock.c 
  Log:
  SVN rev 201703 on 2010-01-07 00:47:50Z by attilio
  
  Exclusive waiters sleeping with LK_SLEEPFAIL on and using interruptible
  sleeps/timeout may have left spourious lk_exslpfail counts on, so clean
  it up even when accessing a shared queue acquisition, giving to
  lk_exslpfail the value of 'upper limit'.
  In the worst case scenario, infact (mixed
  interruptible sleep / LK_SLEEPFAIL waiters) what may happen is that both
  queues are awaken even if that's not necessary, but still no harm.
  
  Reported by:    Lucius Windschuh <lwindschuh at googlemail dot com>
  Reviewed by:    kib
  Tested by:      pho, Lucius Windschuh <lwindschuh at googlemail dot com>
  
  Revision  Changes    Path
  1.152     +25 -3     src/sys/kern/kern_lock.c