From: Sukadev Bhattiprolu <sukadev@xxxxxxxxxxxxxxxxxx> Date: Fri, 10 Dec 2010 19:23:58 -0800 Subject: [PATCH 1/1] Ghost tasks must be detached Ghost processes are created only to help restore orphaned sessions/pgrps. As such once the session/pgrp is created the ghost must not send another SIGCHLD to the parent but exit silently. So create such tasks as "detached". See also: https://lists.linux-foundation.org/pipermail/containers/2010-December/026076.html Signed-off-by: Sukadev Bhattiprolu <sukadev@xxxxxxxxxxxxxxxxxx> --- restart.c | 7 +++++++ 1 files changed, 7 insertions(+), 0 deletions(-) diff --git a/restart.c b/restart.c index 9fb5e9f..d7ba26b 100644 --- a/restart.c +++ b/restart.c @@ -1744,6 +1744,13 @@ static pid_t ckpt_fork_child(struct ckpt_ctx *ctx, struct task *child) flags |= CLONE_THREAD | CLONE_SIGHAND | CLONE_VM; else if (child->flags & TASK_SIBLING) flags |= CLONE_PARENT; + else if (child->flags & (TASK_GHOST|TASK_DEAD)) { + /* + * Ghosts must vanish silently (without signalling parent) + * when they are done. + */ + flags = 0xFF; + } memset(&clone_args, 0, sizeof(clone_args)); clone_args.nr_pids = 1; -- 1.6.0.4 _______________________________________________ Containers mailing list Containers@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/containers
