git: kernel - Fix an inefficiency in wait*()

Matthew Dillon dillon at
Thu Jan 13 18:48:00 PST 2011

commit ce19c8fecac42ac0b6a72ade87299cb5c265732f
Author: Matthew Dillon <dillon at>
Date:   Thu Jan 13 18:44:22 2011 -0800

    kernel - Fix an inefficiency in wait*()
    * The exit code was not taking into account the fact that a parent
      process might race an exiting child, causing a tsleep(... "lwpzomb", hz)
      to delay an entire second.
      Issue the proper wakeup in all cases where p->p_nthreads drops to 1 or 0.
    * Improves buildworld performance a little.

Summary of changes:
 sys/kern/kern_exit.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)

DragonFly BSD source repository

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