git: kernel - Fix lockmgr LK_UPGRADE bug

Matthew Dillon dillon at
Fri Nov 8 20:48:36 PST 2013

commit 6ebd652fc20d94dea78fdb5859a25607ffb66683
Author: Matthew Dillon <dillon at>
Date:   Fri Nov 8 20:46:43 2013 -0800

    kernel - Fix lockmgr LK_UPGRADE bug
    * Fix a bug in the LK_UPGRADE sequencing.  If an LKC_UPREQ owner is present
      and releasing the shared lock would release the lock, the UPREQ owner must
      be granted the exclusive lock right then and there.

Summary of changes:
 sys/kern/kern_lock.c | 25 +++++++++++++++++++++++--
 1 file changed, 23 insertions(+), 2 deletions(-)

DragonFly BSD source repository

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