Re: git: kernel: Don't disturb about-to-be reaped zombies.
:commit 9458c398c0b97d30032a6541f8ab452cd93f5a86
:Author: YONETANI Tomokazu <y0netan1@dragonflybsd.org>
:Date: Fri May 27 22:27:39 2011 +0900
:
: kernel: Don't disturb about-to-be reaped zombies.
:
: Processes in zombproc with p_nthreads == 0 are about to be reaped,
: so just leave them in peace.
:
: Dragonfly-bug: <http://bugs.dragonflybsd.org/issue1996>
:
:Summary of changes:
: sys/kern/kern_proc.c | 5 +++++
: 1 files changed, 5 insertions(+), 0 deletions(-)
:
:http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/9458c398c0b97d30032a6541f8ab452cd93f5a86
:
:--
:DragonFly BSD source repository
I'm not sure about that. nthreads == 0 should just mean that the
process's threads have all exited, not that the zombie process is
about to be reaped by a wait*() call. It will probably be reaped
soon, but not necessarily... it depends on when the user process
actually calls wait*().
What we might have to do instead is add another process flag, say
PREAPING, which would be set in kern_wait() somewhere around line
838 (just after it gets p->p_token). Even then we might want it
to show up in the ps in case it gets stuck during the exit, so it
isn't an invisible stuck process.
` -Matt
Matthew Dillon
<dillon@backplane.com>
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