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List:       dragonfly-commits
Subject:    git: kernel - Fix rare tsleep/callout race
From:       dillon () crater ! dragonflybsd ! org (Matthew Dillon)
Date:       2016-07-29 17:23:53
Message-ID: 20160729172353.7A3F3A4296CF9E () crater ! dragonflybsd ! org
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commit a739e4f85f5a01de1f9f1b414af033798a981373
Author: Matthew Dillon <dillon@apollo.backplane.com>
Date:   Fri Jul 29 10:02:50 2016 -0700

    kernel - Fix rare tsleep/callout race
    
    * Fix a rare tsleep/callout race.  The callout timer can trigger before
      the tsleep() releases its lwp_token (or if someone else holds the
      calling thread's lwp_token).
    
      This case is detected, but failed to adjust lwp_stat before
      descheduling and switching away.  This resulted in an endless sleep.

Summary of changes:
 sys/kern/kern_synch.c | 3 +++
 1 file changed, 3 insertions(+)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/a739e4f85f5a01de1f9f1b414af033798a981373


-- 
DragonFly BSD source repository
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